Home / 28,312.56-39,072.12-15,738.12

Finding the Fourth Proportional to 28,312.56, 39,072.12 and 15,738.12

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Solution

The fourth proportional to 28,312.56, 39,072.12 and 15,738.12 is: 21,719.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,312.56 : 39,072.12 = 15,738.12 : x
  2. Step 2: Convert to fraction form
    28,312.56/39,072.12 = 15,738.12/x
  3. Step 3: Cross multiply
    28,312.56x = 39,072.12 × 15,738.12
  4. Step 4: Simplify right side
    28,312.56x = 614,921,713.21
  5. Step 5: Solve for x
    x = 614,921,713.21/28,312.56
  6. Step 6: Final answer
    x = 21,719.04

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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.