Home / 15,480.88-21,363.72-9,111.28

Finding the Fourth Proportional to 15,480.88, 21,363.72 and 9,111.28

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Solution

The fourth proportional to 15,480.88, 21,363.72 and 9,111.28 is: 12,573.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,480.88 : 21,363.72 = 9,111.28 : x
  2. Step 2: Convert to fraction form
    15,480.88/21,363.72 = 9,111.28/x
  3. Step 3: Cross multiply
    15,480.88x = 21,363.72 × 9,111.28
  4. Step 4: Simplify right side
    15,480.88x = 194,650,834.76
  5. Step 5: Solve for x
    x = 194,650,834.76/15,480.88
  6. Step 6: Final answer
    x = 12,573.63

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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.