Home / 28,254.39-38,990.30-15,507.56

Finding the Fourth Proportional to 28,254.39, 38,990.30 and 15,507.56

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Solution

The fourth proportional to 28,254.39, 38,990.30 and 15,507.56 is: 21,400.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.39 : 38,990.30 = 15,507.56 : x
  2. Step 2: Convert to fraction form
    28,254.39/38,990.30 = 15,507.56/x
  3. Step 3: Cross multiply
    28,254.39x = 38,990.30 × 15,507.56
  4. Step 4: Simplify right side
    28,254.39x = 604,644,144.18
  5. Step 5: Solve for x
    x = 604,644,144.18/28,254.39
  6. Step 6: Final answer
    x = 21,400.01

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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.