Home / 15,455.38-21,328.16-8,740.78

Finding the Fourth Proportional to 15,455.38, 21,328.16 and 8,740.78

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Solution

The fourth proportional to 15,455.38, 21,328.16 and 8,740.78 is: 12,062.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,455.38 : 21,328.16 = 8,740.78 : x
  2. Step 2: Convert to fraction form
    15,455.38/21,328.16 = 8,740.78/x
  3. Step 3: Cross multiply
    15,455.38x = 21,328.16 × 8,740.78
  4. Step 4: Simplify right side
    15,455.38x = 186,424,754.36
  5. Step 5: Solve for x
    x = 186,424,754.36/15,455.38
  6. Step 6: Final answer
    x = 12,062.13

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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.