Home / 15,478.24-21,359.68-8,763.76

Finding the Fourth Proportional to 15,478.24, 21,359.68 and 8,763.76

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Solution

The fourth proportional to 15,478.24, 21,359.68 and 8,763.76 is: 12,093.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.24 : 21,359.68 = 8,763.76 : x
  2. Step 2: Convert to fraction form
    15,478.24/21,359.68 = 8,763.76/x
  3. Step 3: Cross multiply
    15,478.24x = 21,359.68 × 8,763.76
  4. Step 4: Simplify right side
    15,478.24x = 187,191,109.20
  5. Step 5: Solve for x
    x = 187,191,109.20/15,478.24
  6. Step 6: Final answer
    x = 12,093.82

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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.