Home / 21,127.80-29,212.02-18,503.40

Finding the Fourth Proportional to 21,127.80, 29,212.02 and 18,503.40

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Solution

The fourth proportional to 21,127.80, 29,212.02 and 18,503.40 is: 25,583.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.80 : 29,212.02 = 18,503.40 : x
  2. Step 2: Convert to fraction form
    21,127.80/29,212.02 = 18,503.40/x
  3. Step 3: Cross multiply
    21,127.80x = 29,212.02 × 18,503.40
  4. Step 4: Simplify right side
    21,127.80x = 540,521,690.87
  5. Step 5: Solve for x
    x = 540,521,690.87/21,127.80
  6. Step 6: Final answer
    x = 25,583.43

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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.