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Finding the Fourth Proportional to 10,875.68, 15,008.19 and 6,398.45

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Solution

The fourth proportional to 10,875.68, 15,008.19 and 6,398.45 is: 8,829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,875.68 : 15,008.19 = 6,398.45 : x
  2. Step 2: Convert to fraction form
    10,875.68/15,008.19 = 6,398.45/x
  3. Step 3: Cross multiply
    10,875.68x = 15,008.19 × 6,398.45
  4. Step 4: Simplify right side
    10,875.68x = 96,029,153.31
  5. Step 5: Solve for x
    x = 96,029,153.31/10,875.68
  6. Step 6: Final answer
    x = 8,829.71

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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.