Home / 15,391.47-21,240.29-8,317.95

Finding the Fourth Proportional to 15,391.47, 21,240.29 and 8,317.95

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Solution

The fourth proportional to 15,391.47, 21,240.29 and 8,317.95 is: 11,478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,391.47 : 21,240.29 = 8,317.95 : x
  2. Step 2: Convert to fraction form
    15,391.47/21,240.29 = 8,317.95/x
  3. Step 3: Cross multiply
    15,391.47x = 21,240.29 × 8,317.95
  4. Step 4: Simplify right side
    15,391.47x = 176,675,670.21
  5. Step 5: Solve for x
    x = 176,675,670.21/15,391.47
  6. Step 6: Final answer
    x = 11,478.80

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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.