Home / 20,641.92-28,471.34-12,688.53

Finding the Fourth Proportional to 20,641.92, 28,471.34 and 12,688.53

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Solution

The fourth proportional to 20,641.92, 28,471.34 and 12,688.53 is: 17,501.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.92 : 28,471.34 = 12,688.53 : x
  2. Step 2: Convert to fraction form
    20,641.92/28,471.34 = 12,688.53/x
  3. Step 3: Cross multiply
    20,641.92x = 28,471.34 × 12,688.53
  4. Step 4: Simplify right side
    20,641.92x = 361,259,388.29
  5. Step 5: Solve for x
    x = 361,259,388.29/20,641.92
  6. Step 6: Final answer
    x = 17,501.25

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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.