Home / 28,111.12-38,791.02-15,535.84

Finding the Fourth Proportional to 28,111.12, 38,791.02 and 15,535.84

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Solution

The fourth proportional to 28,111.12, 38,791.02 and 15,535.84 is: 21,438.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.12 : 38,791.02 = 15,535.84 : x
  2. Step 2: Convert to fraction form
    28,111.12/38,791.02 = 15,535.84/x
  3. Step 3: Cross multiply
    28,111.12x = 38,791.02 × 15,535.84
  4. Step 4: Simplify right side
    28,111.12x = 602,651,080.16
  5. Step 5: Solve for x
    x = 602,651,080.16/28,111.12
  6. Step 6: Final answer
    x = 21,438.17

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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.