Home / 15,715.60-21,685.70-9,000.83

Finding the Fourth Proportional to 15,715.60, 21,685.70 and 9,000.83

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Solution

The fourth proportional to 15,715.60, 21,685.70 and 9,000.83 is: 12,420.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.60 : 21,685.70 = 9,000.83 : x
  2. Step 2: Convert to fraction form
    15,715.60/21,685.70 = 9,000.83/x
  3. Step 3: Cross multiply
    15,715.60x = 21,685.70 × 9,000.83
  4. Step 4: Simplify right side
    15,715.60x = 195,189,213.20
  5. Step 5: Solve for x
    x = 195,189,213.20/15,715.60
  6. Step 6: Final answer
    x = 12,420.09

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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.