Home / 28,215.28-38,939.88-15,642.46

Finding the Fourth Proportional to 28,215.28, 38,939.88 and 15,642.46

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Solution

The fourth proportional to 28,215.28, 38,939.88 and 15,642.46 is: 21,588.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,215.28 : 38,939.88 = 15,642.46 : x
  2. Step 2: Convert to fraction form
    28,215.28/38,939.88 = 15,642.46/x
  3. Step 3: Cross multiply
    28,215.28x = 38,939.88 × 15,642.46
  4. Step 4: Simplify right side
    28,215.28x = 609,115,515.30
  5. Step 5: Solve for x
    x = 609,115,515.30/28,215.28
  6. Step 6: Final answer
    x = 21,588.14

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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.