Home / 28,439.76-39,246.99-15,693.12

Finding the Fourth Proportional to 28,439.76, 39,246.99 and 15,693.12

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Solution

The fourth proportional to 28,439.76, 39,246.99 and 15,693.12 is: 21,656.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.76 : 39,246.99 = 15,693.12 : x
  2. Step 2: Convert to fraction form
    28,439.76/39,246.99 = 15,693.12/x
  3. Step 3: Cross multiply
    28,439.76x = 39,246.99 × 15,693.12
  4. Step 4: Simplify right side
    28,439.76x = 615,907,723.71
  5. Step 5: Solve for x
    x = 615,907,723.71/28,439.76
  6. Step 6: Final answer
    x = 21,656.57

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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.