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Finding the Fourth Proportional to 19,008.40, 28,487.70 and 10,224.40

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Solution

The fourth proportional to 19,008.40, 28,487.70 and 10,224.40 is: 15,323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008.40 : 28,487.70 = 10,224.40 : x
  2. Step 2: Convert to fraction form
    19,008.40/28,487.70 = 10,224.40/x
  3. Step 3: Cross multiply
    19,008.40x = 28,487.70 × 10,224.40
  4. Step 4: Simplify right side
    19,008.40x = 291,269,639.88
  5. Step 5: Solve for x
    x = 291,269,639.88/19,008.40
  6. Step 6: Final answer
    x = 15,323.21

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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.