Home / 15,471.92-21,340.68-9,880.40

Finding the Fourth Proportional to 15,471.92, 21,340.68 and 9,880.40

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Solution

The fourth proportional to 15,471.92, 21,340.68 and 9,880.40 is: 13,628.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.92 : 21,340.68 = 9,880.40 : x
  2. Step 2: Convert to fraction form
    15,471.92/21,340.68 = 9,880.40/x
  3. Step 3: Cross multiply
    15,471.92x = 21,340.68 × 9,880.40
  4. Step 4: Simplify right side
    15,471.92x = 210,854,454.67
  5. Step 5: Solve for x
    x = 210,854,454.67/15,471.92
  6. Step 6: Final answer
    x = 13,628.20

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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.