Home / 15,280.35-22,815.99-13,688.80

Finding the Fourth Proportional to 15,280.35, 22,815.99 and 13,688.80

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Solution

The fourth proportional to 15,280.35, 22,815.99 and 13,688.80 is: 20,439.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,280.35 : 22,815.99 = 13,688.80 : x
  2. Step 2: Convert to fraction form
    15,280.35/22,815.99 = 13,688.80/x
  3. Step 3: Cross multiply
    15,280.35x = 22,815.99 × 13,688.80
  4. Step 4: Simplify right side
    15,280.35x = 312,323,455.47
  5. Step 5: Solve for x
    x = 312,323,455.47/15,280.35
  6. Step 6: Final answer
    x = 20,439.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.