Home / 28,456.08-39,270.92-15,880.72

Finding the Fourth Proportional to 28,456.08, 39,270.92 and 15,880.72

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Solution

The fourth proportional to 28,456.08, 39,270.92 and 15,880.72 is: 21,916.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.08 : 39,270.92 = 15,880.72 : x
  2. Step 2: Convert to fraction form
    28,456.08/39,270.92 = 15,880.72/x
  3. Step 3: Cross multiply
    28,456.08x = 39,270.92 × 15,880.72
  4. Step 4: Simplify right side
    28,456.08x = 623,650,484.66
  5. Step 5: Solve for x
    x = 623,650,484.66/28,456.08
  6. Step 6: Final answer
    x = 21,916.25

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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.