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Finding the Fourth Proportional to 6,641.60, 9,962.40 and 5,572.40

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Solution

The fourth proportional to 6,641.60, 9,962.40 and 5,572.40 is: 8,358.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.60 : 9,962.40 = 5,572.40 : x
  2. Step 2: Convert to fraction form
    6,641.60/9,962.40 = 5,572.40/x
  3. Step 3: Cross multiply
    6,641.60x = 9,962.40 × 5,572.40
  4. Step 4: Simplify right side
    6,641.60x = 55,514,477.76
  5. Step 5: Solve for x
    x = 55,514,477.76/6,641.60
  6. Step 6: Final answer
    x = 8,358.60

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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.