Home / 21,420.90-29,567.16-12,472.38

Finding the Fourth Proportional to 21,420.90, 29,567.16 and 12,472.38

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Solution

The fourth proportional to 21,420.90, 29,567.16 and 12,472.38 is: 17,215.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.90 : 29,567.16 = 12,472.38 : x
  2. Step 2: Convert to fraction form
    21,420.90/29,567.16 = 12,472.38/x
  3. Step 3: Cross multiply
    21,420.90x = 29,567.16 × 12,472.38
  4. Step 4: Simplify right side
    21,420.90x = 368,772,855.04
  5. Step 5: Solve for x
    x = 368,772,855.04/21,420.90
  6. Step 6: Final answer
    x = 17,215.56

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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.