Home / 28,302.72-39,056.40-15,727.20

Finding the Fourth Proportional to 28,302.72, 39,056.40 and 15,727.20

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Solution

The fourth proportional to 28,302.72, 39,056.40 and 15,727.20 is: 21,702.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,302.72 : 39,056.40 = 15,727.20 : x
  2. Step 2: Convert to fraction form
    28,302.72/39,056.40 = 15,727.20/x
  3. Step 3: Cross multiply
    28,302.72x = 39,056.40 × 15,727.20
  4. Step 4: Simplify right side
    28,302.72x = 614,247,814.08
  5. Step 5: Solve for x
    x = 614,247,814.08/28,302.72
  6. Step 6: Final answer
    x = 21,702.78

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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.