Home / 15,315.20-21,133.68-8,600.30

Finding the Fourth Proportional to 15,315.20, 21,133.68 and 8,600.30

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Solution

The fourth proportional to 15,315.20, 21,133.68 and 8,600.30 is: 11,867.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.20 : 21,133.68 = 8,600.30 : x
  2. Step 2: Convert to fraction form
    15,315.20/21,133.68 = 8,600.30/x
  3. Step 3: Cross multiply
    15,315.20x = 21,133.68 × 8,600.30
  4. Step 4: Simplify right side
    15,315.20x = 181,755,988.10
  5. Step 5: Solve for x
    x = 181,755,988.10/15,315.20
  6. Step 6: Final answer
    x = 11,867.69

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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.