Home / 21,409.20-32,113.80-9,708.78

Finding the Fourth Proportional to 21,409.20, 32,113.80 and 9,708.78

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Solution

The fourth proportional to 21,409.20, 32,113.80 and 9,708.78 is: 14,563.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.20 : 32,113.80 = 9,708.78 : x
  2. Step 2: Convert to fraction form
    21,409.20/32,113.80 = 9,708.78/x
  3. Step 3: Cross multiply
    21,409.20x = 32,113.80 × 9,708.78
  4. Step 4: Simplify right side
    21,409.20x = 311,785,819.16
  5. Step 5: Solve for x
    x = 311,785,819.16/21,409.20
  6. Step 6: Final answer
    x = 14,563.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.