Home / 15,424.20-21,285.29-8,709.79

Finding the Fourth Proportional to 15,424.20, 21,285.29 and 8,709.79

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Solution

The fourth proportional to 15,424.20, 21,285.29 and 8,709.79 is: 12,019.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.20 : 21,285.29 = 8,709.79 : x
  2. Step 2: Convert to fraction form
    15,424.20/21,285.29 = 8,709.79/x
  3. Step 3: Cross multiply
    15,424.20x = 21,285.29 × 8,709.79
  4. Step 4: Simplify right side
    15,424.20x = 185,390,405.99
  5. Step 5: Solve for x
    x = 185,390,405.99/15,424.20
  6. Step 6: Final answer
    x = 12,019.45

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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.