Home / 15,423.20-21,283.91-8,708.79

Finding the Fourth Proportional to 15,423.20, 21,283.91 and 8,708.79

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Solution

The fourth proportional to 15,423.20, 21,283.91 and 8,708.79 is: 12,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.20 : 21,283.91 = 8,708.79 : x
  2. Step 2: Convert to fraction form
    15,423.20/21,283.91 = 8,708.79/x
  3. Step 3: Cross multiply
    15,423.20x = 21,283.91 × 8,708.79
  4. Step 4: Simplify right side
    15,423.20x = 185,357,102.57
  5. Step 5: Solve for x
    x = 185,357,102.57/15,423.20
  6. Step 6: Final answer
    x = 12,018.07

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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.