Home / 28,488.72-39,315.04-15,741.92

Finding the Fourth Proportional to 28,488.72, 39,315.04 and 15,741.92

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Solution

The fourth proportional to 28,488.72, 39,315.04 and 15,741.92 is: 21,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.72 : 39,315.04 = 15,741.92 : x
  2. Step 2: Convert to fraction form
    28,488.72/39,315.04 = 15,741.92/x
  3. Step 3: Cross multiply
    28,488.72x = 39,315.04 × 15,741.92
  4. Step 4: Simplify right side
    28,488.72x = 618,894,214.48
  5. Step 5: Solve for x
    x = 618,894,214.48/28,488.72
  6. Step 6: Final answer
    x = 21,724.18

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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.