Home / 21,637.72-29,860.28-12,685.47

Finding the Fourth Proportional to 21,637.72, 29,860.28 and 12,685.47

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Solution

The fourth proportional to 21,637.72, 29,860.28 and 12,685.47 is: 17,506.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,637.72 : 29,860.28 = 12,685.47 : x
  2. Step 2: Convert to fraction form
    21,637.72/29,860.28 = 12,685.47/x
  3. Step 3: Cross multiply
    21,637.72x = 29,860.28 × 12,685.47
  4. Step 4: Simplify right side
    21,637.72x = 378,791,686.13
  5. Step 5: Solve for x
    x = 378,791,686.13/21,637.72
  6. Step 6: Final answer
    x = 17,506.08

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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.