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Finding the Fourth Proportional to 10,409.80, 15,614.70 and 10,215.40

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Solution

The fourth proportional to 10,409.80, 15,614.70 and 10,215.40 is: 15,323.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,409.80 : 15,614.70 = 10,215.40 : x
  2. Step 2: Convert to fraction form
    10,409.80/15,614.70 = 10,215.40/x
  3. Step 3: Cross multiply
    10,409.80x = 15,614.70 × 10,215.40
  4. Step 4: Simplify right side
    10,409.80x = 159,510,406.38
  5. Step 5: Solve for x
    x = 159,510,406.38/10,409.80
  6. Step 6: Final answer
    x = 15,323.10

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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.