Home / 21,255.16-29,331.98-11,695.63

Finding the Fourth Proportional to 21,255.16, 29,331.98 and 11,695.63

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Solution

The fourth proportional to 21,255.16, 29,331.98 and 11,695.63 is: 16,139.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.16 : 29,331.98 = 11,695.63 : x
  2. Step 2: Convert to fraction form
    21,255.16/29,331.98 = 11,695.63/x
  3. Step 3: Cross multiply
    21,255.16x = 29,331.98 × 11,695.63
  4. Step 4: Simplify right side
    21,255.16x = 343,055,985.25
  5. Step 5: Solve for x
    x = 343,055,985.25/21,255.16
  6. Step 6: Final answer
    x = 16,139.89

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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.