Home / 28,378.32-39,156.60-15,803.04

Finding the Fourth Proportional to 28,378.32, 39,156.60 and 15,803.04

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Solution

The fourth proportional to 28,378.32, 39,156.60 and 15,803.04 is: 21,805.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.32 : 39,156.60 = 15,803.04 : x
  2. Step 2: Convert to fraction form
    28,378.32/39,156.60 = 15,803.04/x
  3. Step 3: Cross multiply
    28,378.32x = 39,156.60 × 15,803.04
  4. Step 4: Simplify right side
    28,378.32x = 618,793,316.06
  5. Step 5: Solve for x
    x = 618,793,316.06/28,378.32
  6. Step 6: Final answer
    x = 21,805.14

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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.