Home / 15,392.88-21,242.10-8,319.28

Finding the Fourth Proportional to 15,392.88, 21,242.10 and 8,319.28

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Solution

The fourth proportional to 15,392.88, 21,242.10 and 8,319.28 is: 11,480.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,392.88 : 21,242.10 = 8,319.28 : x
  2. Step 2: Convert to fraction form
    15,392.88/21,242.10 = 8,319.28/x
  3. Step 3: Cross multiply
    15,392.88x = 21,242.10 × 8,319.28
  4. Step 4: Simplify right side
    15,392.88x = 176,718,977.69
  5. Step 5: Solve for x
    x = 176,718,977.69/15,392.88
  6. Step 6: Final answer
    x = 11,480.57

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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.