Home / 28,434.40-39,237.70-15,687.75

Finding the Fourth Proportional to 28,434.40, 39,237.70 and 15,687.75

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Solution

The fourth proportional to 28,434.40, 39,237.70 and 15,687.75 is: 21,648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,434.40 : 39,237.70 = 15,687.75 : x
  2. Step 2: Convert to fraction form
    28,434.40/39,237.70 = 15,687.75/x
  3. Step 3: Cross multiply
    28,434.40x = 39,237.70 × 15,687.75
  4. Step 4: Simplify right side
    28,434.40x = 615,551,228.18
  5. Step 5: Solve for x
    x = 615,551,228.18/28,434.40
  6. Step 6: Final answer
    x = 21,648.12

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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.