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Finding the Fourth Proportional to 19,607.70, 29,411.55 and 13,386.90

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Solution

The fourth proportional to 19,607.70, 29,411.55 and 13,386.90 is: 20,080.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,607.70 : 29,411.55 = 13,386.90 : x
  2. Step 2: Convert to fraction form
    19,607.70/29,411.55 = 13,386.90/x
  3. Step 3: Cross multiply
    19,607.70x = 29,411.55 × 13,386.90
  4. Step 4: Simplify right side
    19,607.70x = 393,729,478.70
  5. Step 5: Solve for x
    x = 393,729,478.70/19,607.70
  6. Step 6: Final answer
    x = 20,080.35

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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.