Home / 21,031.86-28,964.91-20,572.59

Finding the Fourth Proportional to 21,031.86, 28,964.91 and 20,572.59

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Solution

The fourth proportional to 21,031.86, 28,964.91 and 20,572.59 is: 28,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.86 : 28,964.91 = 20,572.59 : x
  2. Step 2: Convert to fraction form
    21,031.86/28,964.91 = 20,572.59/x
  3. Step 3: Cross multiply
    21,031.86x = 28,964.91 × 20,572.59
  4. Step 4: Simplify right side
    21,031.86x = 595,882,970.13
  5. Step 5: Solve for x
    x = 595,882,970.13/21,031.86
  6. Step 6: Final answer
    x = 28,332.40

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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.