Home / 15,424.95-21,288.42-8,712.30

Finding the Fourth Proportional to 15,424.95, 21,288.42 and 8,712.30

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Solution

The fourth proportional to 15,424.95, 21,288.42 and 8,712.30 is: 12,024.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.95 : 21,288.42 = 8,712.30 : x
  2. Step 2: Convert to fraction form
    15,424.95/21,288.42 = 8,712.30/x
  3. Step 3: Cross multiply
    15,424.95x = 21,288.42 × 8,712.30
  4. Step 4: Simplify right side
    15,424.95x = 185,471,101.57
  5. Step 5: Solve for x
    x = 185,471,101.57/15,424.95
  6. Step 6: Final answer
    x = 12,024.10

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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.