Home / 21,117.16-29,140.84-11,685.52

Finding the Fourth Proportional to 21,117.16, 29,140.84 and 11,685.52

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Solution

The fourth proportional to 21,117.16, 29,140.84 and 11,685.52 is: 16,125.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.16 : 29,140.84 = 11,685.52 : x
  2. Step 2: Convert to fraction form
    21,117.16/29,140.84 = 11,685.52/x
  3. Step 3: Cross multiply
    21,117.16x = 29,140.84 × 11,685.52
  4. Step 4: Simplify right side
    21,117.16x = 340,525,868.64
  5. Step 5: Solve for x
    x = 340,525,868.64/21,117.16
  6. Step 6: Final answer
    x = 16,125.55

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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.