Home / 28,056.78-38,718-15,480.72

Finding the Fourth Proportional to 28,056.78, 38,718 and 15,480.72

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Solution

The fourth proportional to 28,056.78, 38,718 and 15,480.72 is: 21,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,056.78 : 38,718 = 15,480.72 : x
  2. Step 2: Convert to fraction form
    28,056.78/38,718 = 15,480.72/x
  3. Step 3: Cross multiply
    28,056.78x = 38,718 × 15,480.72
  4. Step 4: Simplify right side
    28,056.78x = 599,382,516.96
  5. Step 5: Solve for x
    x = 599,382,516.96/28,056.78
  6. Step 6: Final answer
    x = 21,363.20

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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.