Home / 20,507.88-28,302.21-15,463.20

Finding the Fourth Proportional to 20,507.88, 28,302.21 and 15,463.20

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Solution

The fourth proportional to 20,507.88, 28,302.21 and 15,463.20 is: 21,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.88 : 28,302.21 = 15,463.20 : x
  2. Step 2: Convert to fraction form
    20,507.88/28,302.21 = 15,463.20/x
  3. Step 3: Cross multiply
    20,507.88x = 28,302.21 × 15,463.20
  4. Step 4: Simplify right side
    20,507.88x = 437,642,733.67
  5. Step 5: Solve for x
    x = 437,642,733.67/20,507.88
  6. Step 6: Final answer
    x = 21,340.22

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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.