Home / 31,021.87-42,810.30-16,874.71

Finding the Fourth Proportional to 31,021.87, 42,810.30 and 16,874.71

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Solution

The fourth proportional to 31,021.87, 42,810.30 and 16,874.71 is: 23,287.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,021.87 : 42,810.30 = 16,874.71 : x
  2. Step 2: Convert to fraction form
    31,021.87/42,810.30 = 16,874.71/x
  3. Step 3: Cross multiply
    31,021.87x = 42,810.30 × 16,874.71
  4. Step 4: Simplify right side
    31,021.87x = 722,411,397.51
  5. Step 5: Solve for x
    x = 722,411,397.51/31,021.87
  6. Step 6: Final answer
    x = 23,287.16

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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.