Home / 15,423.20-21,319.89-13,761.08

Finding the Fourth Proportional to 15,423.20, 21,319.89 and 13,761.08

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Solution

The fourth proportional to 15,423.20, 21,319.89 and 13,761.08 is: 19,022.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.20 : 21,319.89 = 13,761.08 : x
  2. Step 2: Convert to fraction form
    15,423.20/21,319.89 = 13,761.08/x
  3. Step 3: Cross multiply
    15,423.20x = 21,319.89 × 13,761.08
  4. Step 4: Simplify right side
    15,423.20x = 293,384,711.88
  5. Step 5: Solve for x
    x = 293,384,711.88/15,423.20
  6. Step 6: Final answer
    x = 19,022.30

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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.