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Finding the Fourth Proportional to 31,980.78, 44,129.80 and 18,547.13

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Solution

The fourth proportional to 31,980.78, 44,129.80 and 18,547.13 is: 25,592.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,980.78 : 44,129.80 = 18,547.13 : x
  2. Step 2: Convert to fraction form
    31,980.78/44,129.80 = 18,547.13/x
  3. Step 3: Cross multiply
    31,980.78x = 44,129.80 × 18,547.13
  4. Step 4: Simplify right side
    31,980.78x = 818,481,137.47
  5. Step 5: Solve for x
    x = 818,481,137.47/31,980.78
  6. Step 6: Final answer
    x = 25,592.91

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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.