Home / 21,389.87-32,047.85-15,139.31

Finding the Fourth Proportional to 21,389.87, 32,047.85 and 15,139.31

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Solution

The fourth proportional to 21,389.87, 32,047.85 and 15,139.31 is: 22,682.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.87 : 32,047.85 = 15,139.31 : x
  2. Step 2: Convert to fraction form
    21,389.87/32,047.85 = 15,139.31/x
  3. Step 3: Cross multiply
    21,389.87x = 32,047.85 × 15,139.31
  4. Step 4: Simplify right side
    21,389.87x = 485,182,213.59
  5. Step 5: Solve for x
    x = 485,182,213.59/21,389.87
  6. Step 6: Final answer
    x = 22,682.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.