Home / 39,031.28-53,863.30-21,126.28

Finding the Fourth Proportional to 39,031.28, 53,863.30 and 21,126.28

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Solution

The fourth proportional to 39,031.28, 53,863.30 and 21,126.28 is: 29,154.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,031.28 : 53,863.30 = 21,126.28 : x
  2. Step 2: Convert to fraction form
    39,031.28/53,863.30 = 21,126.28/x
  3. Step 3: Cross multiply
    39,031.28x = 53,863.30 × 21,126.28
  4. Step 4: Simplify right side
    39,031.28x = 1,137,931,157.52
  5. Step 5: Solve for x
    x = 1,137,931,157.52/39,031.28
  6. Step 6: Final answer
    x = 29,154.34

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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.