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Finding the Fourth Proportional to 19,406.80, 29,153.40 and 18,672.40

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Solution

The fourth proportional to 19,406.80, 29,153.40 and 18,672.40 is: 28,050.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,406.80 : 29,153.40 = 18,672.40 : x
  2. Step 2: Convert to fraction form
    19,406.80/29,153.40 = 18,672.40/x
  3. Step 3: Cross multiply
    19,406.80x = 29,153.40 × 18,672.40
  4. Step 4: Simplify right side
    19,406.80x = 544,363,946.16
  5. Step 5: Solve for x
    x = 544,363,946.16/19,406.80
  6. Step 6: Final answer
    x = 28,050.17

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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.