Home / 21,420.72-29,560.77-12,473.46

Finding the Fourth Proportional to 21,420.72, 29,560.77 and 12,473.46

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Solution

The fourth proportional to 21,420.72, 29,560.77 and 12,473.46 is: 17,213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.72 : 29,560.77 = 12,473.46 : x
  2. Step 2: Convert to fraction form
    21,420.72/29,560.77 = 12,473.46/x
  3. Step 3: Cross multiply
    21,420.72x = 29,560.77 × 12,473.46
  4. Step 4: Simplify right side
    21,420.72x = 368,725,082.16
  5. Step 5: Solve for x
    x = 368,725,082.16/21,420.72
  6. Step 6: Final answer
    x = 17,213.48

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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.