Home / 31,164.13-42,984.67-21,088.13

Finding the Fourth Proportional to 31,164.13, 42,984.67 and 21,088.13

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Solution

The fourth proportional to 31,164.13, 42,984.67 and 21,088.13 is: 29,086.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,164.13 : 42,984.67 = 21,088.13 : x
  2. Step 2: Convert to fraction form
    31,164.13/42,984.67 = 21,088.13/x
  3. Step 3: Cross multiply
    31,164.13x = 42,984.67 × 21,088.13
  4. Step 4: Simplify right side
    31,164.13x = 906,466,203.53
  5. Step 5: Solve for x
    x = 906,466,203.53/31,164.13
  6. Step 6: Final answer
    x = 29,086.85

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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.