Home / 31,715.80-43,743.18-21,652.36

Finding the Fourth Proportional to 31,715.80, 43,743.18 and 21,652.36

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Solution

The fourth proportional to 31,715.80, 43,743.18 and 21,652.36 is: 29,863.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,715.80 : 43,743.18 = 21,652.36 : x
  2. Step 2: Convert to fraction form
    31,715.80/43,743.18 = 21,652.36/x
  3. Step 3: Cross multiply
    31,715.80x = 43,743.18 × 21,652.36
  4. Step 4: Simplify right side
    31,715.80x = 947,143,080.90
  5. Step 5: Solve for x
    x = 947,143,080.90/31,715.80
  6. Step 6: Final answer
    x = 29,863.45

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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.