Home / 31,128.40-42,959.22-17,700.90

Finding the Fourth Proportional to 31,128.40, 42,959.22 and 17,700.90

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Solution

The fourth proportional to 31,128.40, 42,959.22 and 17,700.90 is: 24,428.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,128.40 : 42,959.22 = 17,700.90 : x
  2. Step 2: Convert to fraction form
    31,128.40/42,959.22 = 17,700.90/x
  3. Step 3: Cross multiply
    31,128.40x = 42,959.22 × 17,700.90
  4. Step 4: Simplify right side
    31,128.40x = 760,416,857.30
  5. Step 5: Solve for x
    x = 760,416,857.30/31,128.40
  6. Step 6: Final answer
    x = 24,428.40

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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.