Home / 28,254.16-38,990.70-15,507.42

Finding the Fourth Proportional to 28,254.16, 38,990.70 and 15,507.42

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Solution

The fourth proportional to 28,254.16, 38,990.70 and 15,507.42 is: 21,400.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.16 : 38,990.70 = 15,507.42 : x
  2. Step 2: Convert to fraction form
    28,254.16/38,990.70 = 15,507.42/x
  3. Step 3: Cross multiply
    28,254.16x = 38,990.70 × 15,507.42
  4. Step 4: Simplify right side
    28,254.16x = 604,645,160.99
  5. Step 5: Solve for x
    x = 604,645,160.99/28,254.16
  6. Step 6: Final answer
    x = 21,400.22

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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.