Home / 28,156.56-38,857.28-15,581.31

Finding the Fourth Proportional to 28,156.56, 38,857.28 and 15,581.31

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Solution

The fourth proportional to 28,156.56, 38,857.28 and 15,581.31 is: 21,502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.56 : 38,857.28 = 15,581.31 : x
  2. Step 2: Convert to fraction form
    28,156.56/38,857.28 = 15,581.31/x
  3. Step 3: Cross multiply
    28,156.56x = 38,857.28 × 15,581.31
  4. Step 4: Simplify right side
    28,156.56x = 605,447,325.44
  5. Step 5: Solve for x
    x = 605,447,325.44/28,156.56
  6. Step 6: Final answer
    x = 21,502.89

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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.