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Finding the Fourth Proportional to 7,886.10, 11,829.15 and 6,590.10

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Solution

The fourth proportional to 7,886.10, 11,829.15 and 6,590.10 is: 9,885.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.10 : 11,829.15 = 6,590.10 : x
  2. Step 2: Convert to fraction form
    7,886.10/11,829.15 = 6,590.10/x
  3. Step 3: Cross multiply
    7,886.10x = 11,829.15 × 6,590.10
  4. Step 4: Simplify right side
    7,886.10x = 77,955,281.42
  5. Step 5: Solve for x
    x = 77,955,281.42/7,886.10
  6. Step 6: Final answer
    x = 9,885.15

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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.