Home / 21,939.47-30,264.17-13,445.71

Finding the Fourth Proportional to 21,939.47, 30,264.17 and 13,445.71

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Solution

The fourth proportional to 21,939.47, 30,264.17 and 13,445.71 is: 18,547.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.47 : 30,264.17 = 13,445.71 : x
  2. Step 2: Convert to fraction form
    21,939.47/30,264.17 = 13,445.71/x
  3. Step 3: Cross multiply
    21,939.47x = 30,264.17 × 13,445.71
  4. Step 4: Simplify right side
    21,939.47x = 406,923,110.32
  5. Step 5: Solve for x
    x = 406,923,110.32/21,939.47
  6. Step 6: Final answer
    x = 18,547.54

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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.