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Finding the Fourth Proportional to 10,875.78, 15,008.14 and 6,159.78

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Solution

The fourth proportional to 10,875.78, 15,008.14 and 6,159.78 is: 8,500.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,875.78 : 15,008.14 = 6,159.78 : x
  2. Step 2: Convert to fraction form
    10,875.78/15,008.14 = 6,159.78/x
  3. Step 3: Cross multiply
    10,875.78x = 15,008.14 × 6,159.78
  4. Step 4: Simplify right side
    10,875.78x = 92,446,840.61
  5. Step 5: Solve for x
    x = 92,446,840.61/10,875.78
  6. Step 6: Final answer
    x = 8,500.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.