Home / 21,319.95-29,421.64-11,760.17

Finding the Fourth Proportional to 21,319.95, 29,421.64 and 11,760.17

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Solution

The fourth proportional to 21,319.95, 29,421.64 and 11,760.17 is: 16,229.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.95 : 29,421.64 = 11,760.17 : x
  2. Step 2: Convert to fraction form
    21,319.95/29,421.64 = 11,760.17/x
  3. Step 3: Cross multiply
    21,319.95x = 29,421.64 × 11,760.17
  4. Step 4: Simplify right side
    21,319.95x = 346,003,466.00
  5. Step 5: Solve for x
    x = 346,003,466.00/21,319.95
  6. Step 6: Final answer
    x = 16,229.10

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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.