Home / 21,036.24-29,032.04-15,721.80

Finding the Fourth Proportional to 21,036.24, 29,032.04 and 15,721.80

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Solution

The fourth proportional to 21,036.24, 29,032.04 and 15,721.80 is: 21,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.24 : 29,032.04 = 15,721.80 : x
  2. Step 2: Convert to fraction form
    21,036.24/29,032.04 = 15,721.80/x
  3. Step 3: Cross multiply
    21,036.24x = 29,032.04 × 15,721.80
  4. Step 4: Simplify right side
    21,036.24x = 456,435,926.47
  5. Step 5: Solve for x
    x = 456,435,926.47/21,036.24
  6. Step 6: Final answer
    x = 21,697.60

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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.