Home / 21,438.80-29,587.11-12,943.01

Finding the Fourth Proportional to 21,438.80, 29,587.11 and 12,943.01

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Solution

The fourth proportional to 21,438.80, 29,587.11 and 12,943.01 is: 17,862.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.80 : 29,587.11 = 12,943.01 : x
  2. Step 2: Convert to fraction form
    21,438.80/29,587.11 = 12,943.01/x
  3. Step 3: Cross multiply
    21,438.80x = 29,587.11 × 12,943.01
  4. Step 4: Simplify right side
    21,438.80x = 382,946,260.60
  5. Step 5: Solve for x
    x = 382,946,260.60/21,438.80
  6. Step 6: Final answer
    x = 17,862.30

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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.