Home / 28,278.16-39,025.16-15,702.96

Finding the Fourth Proportional to 28,278.16, 39,025.16 and 15,702.96

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Solution

The fourth proportional to 28,278.16, 39,025.16 and 15,702.96 is: 21,670.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,278.16 : 39,025.16 = 15,702.96 : x
  2. Step 2: Convert to fraction form
    28,278.16/39,025.16 = 15,702.96/x
  3. Step 3: Cross multiply
    28,278.16x = 39,025.16 × 15,702.96
  4. Step 4: Simplify right side
    28,278.16x = 612,810,526.47
  5. Step 5: Solve for x
    x = 612,810,526.47/28,278.16
  6. Step 6: Final answer
    x = 21,670.81

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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.