Home / 21,154.30-29,133.74-20,695.12

Finding the Fourth Proportional to 21,154.30, 29,133.74 and 20,695.12

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Solution

The fourth proportional to 21,154.30, 29,133.74 and 20,695.12 is: 28,501.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.30 : 29,133.74 = 20,695.12 : x
  2. Step 2: Convert to fraction form
    21,154.30/29,133.74 = 20,695.12/x
  3. Step 3: Cross multiply
    21,154.30x = 29,133.74 × 20,695.12
  4. Step 4: Simplify right side
    21,154.30x = 602,926,245.35
  5. Step 5: Solve for x
    x = 602,926,245.35/21,154.30
  6. Step 6: Final answer
    x = 28,501.36

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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.