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Finding the Fourth Proportional to 6,445.10, 9,667.65 and 6,128.30

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Solution

The fourth proportional to 6,445.10, 9,667.65 and 6,128.30 is: 9,192.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,445.10 : 9,667.65 = 6,128.30 : x
  2. Step 2: Convert to fraction form
    6,445.10/9,667.65 = 6,128.30/x
  3. Step 3: Cross multiply
    6,445.10x = 9,667.65 × 6,128.30
  4. Step 4: Simplify right side
    6,445.10x = 59,246,259.50
  5. Step 5: Solve for x
    x = 59,246,259.50/6,445.10
  6. Step 6: Final answer
    x = 9,192.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.