Home / 23,187.20-31,988.40-15,638.40

Finding the Fourth Proportional to 23,187.20, 31,988.40 and 15,638.40

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Solution

The fourth proportional to 23,187.20, 31,988.40 and 15,638.40 is: 21,574.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,187.20 : 31,988.40 = 15,638.40 : x
  2. Step 2: Convert to fraction form
    23,187.20/31,988.40 = 15,638.40/x
  3. Step 3: Cross multiply
    23,187.20x = 31,988.40 × 15,638.40
  4. Step 4: Simplify right side
    23,187.20x = 500,247,394.56
  5. Step 5: Solve for x
    x = 500,247,394.56/23,187.20
  6. Step 6: Final answer
    x = 21,574.29

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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.