Home / 20,731.20-28,630.74-14,287.59

Finding the Fourth Proportional to 20,731.20, 28,630.74 and 14,287.59

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Solution

The fourth proportional to 20,731.20, 28,630.74 and 14,287.59 is: 19,731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.20 : 28,630.74 = 14,287.59 : x
  2. Step 2: Convert to fraction form
    20,731.20/28,630.74 = 14,287.59/x
  3. Step 3: Cross multiply
    20,731.20x = 28,630.74 × 14,287.59
  4. Step 4: Simplify right side
    20,731.20x = 409,064,274.52
  5. Step 5: Solve for x
    x = 409,064,274.52/20,731.20
  6. Step 6: Final answer
    x = 19,731.82

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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.