Home / 21,411.60-29,544.12-13,761.60

Finding the Fourth Proportional to 21,411.60, 29,544.12 and 13,761.60

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Solution

The fourth proportional to 21,411.60, 29,544.12 and 13,761.60 is: 18,988.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.60 : 29,544.12 = 13,761.60 : x
  2. Step 2: Convert to fraction form
    21,411.60/29,544.12 = 13,761.60/x
  3. Step 3: Cross multiply
    21,411.60x = 29,544.12 × 13,761.60
  4. Step 4: Simplify right side
    21,411.60x = 406,574,361.79
  5. Step 5: Solve for x
    x = 406,574,361.79/21,411.60
  6. Step 6: Final answer
    x = 18,988.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.