Home / 28,217.84-38,937.72-15,639.92

Finding the Fourth Proportional to 28,217.84, 38,937.72 and 15,639.92

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Solution

The fourth proportional to 28,217.84, 38,937.72 and 15,639.92 is: 21,581.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.84 : 38,937.72 = 15,639.92 : x
  2. Step 2: Convert to fraction form
    28,217.84/38,937.72 = 15,639.92/x
  3. Step 3: Cross multiply
    28,217.84x = 38,937.72 × 15,639.92
  4. Step 4: Simplify right side
    28,217.84x = 608,982,825.78
  5. Step 5: Solve for x
    x = 608,982,825.78/28,217.84
  6. Step 6: Final answer
    x = 21,581.48

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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.