Home / 21,728.04-29,985.12-14,179.20

Finding the Fourth Proportional to 21,728.04, 29,985.12 and 14,179.20

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Solution

The fourth proportional to 21,728.04, 29,985.12 and 14,179.20 is: 19,567.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.04 : 29,985.12 = 14,179.20 : x
  2. Step 2: Convert to fraction form
    21,728.04/29,985.12 = 14,179.20/x
  3. Step 3: Cross multiply
    21,728.04x = 29,985.12 × 14,179.20
  4. Step 4: Simplify right side
    21,728.04x = 425,165,013.50
  5. Step 5: Solve for x
    x = 425,165,013.50/21,728.04
  6. Step 6: Final answer
    x = 19,567.57

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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.