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Finding the Fourth Proportional to 15,978.39, 22,045.39 and 10,316.35

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Solution

The fourth proportional to 15,978.39, 22,045.39 and 10,316.35 is: 14,233.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,978.39 : 22,045.39 = 10,316.35 : x
  2. Step 2: Convert to fraction form
    15,978.39/22,045.39 = 10,316.35/x
  3. Step 3: Cross multiply
    15,978.39x = 22,045.39 × 10,316.35
  4. Step 4: Simplify right side
    15,978.39x = 227,427,959.13
  5. Step 5: Solve for x
    x = 227,427,959.13/15,978.39
  6. Step 6: Final answer
    x = 14,233.47

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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.