Home / 27,543.81-38,031.89-21,160.34

Finding the Fourth Proportional to 27,543.81, 38,031.89 and 21,160.34

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Solution

The fourth proportional to 27,543.81, 38,031.89 and 21,160.34 is: 29,217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,543.81 : 38,031.89 = 21,160.34 : x
  2. Step 2: Convert to fraction form
    27,543.81/38,031.89 = 21,160.34/x
  3. Step 3: Cross multiply
    27,543.81x = 38,031.89 × 21,160.34
  4. Step 4: Simplify right side
    27,543.81x = 804,767,569.90
  5. Step 5: Solve for x
    x = 804,767,569.90/27,543.81
  6. Step 6: Final answer
    x = 29,217.72

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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.