Home / 15,423.60-21,285.83-8,710.86

Finding the Fourth Proportional to 15,423.60, 21,285.83 and 8,710.86

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Solution

The fourth proportional to 15,423.60, 21,285.83 and 8,710.86 is: 12,021.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.60 : 21,285.83 = 8,710.86 : x
  2. Step 2: Convert to fraction form
    15,423.60/21,285.83 = 8,710.86/x
  3. Step 3: Cross multiply
    15,423.60x = 21,285.83 × 8,710.86
  4. Step 4: Simplify right side
    15,423.60x = 185,417,841.56
  5. Step 5: Solve for x
    x = 185,417,841.56/15,423.60
  6. Step 6: Final answer
    x = 12,021.70

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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.