Home / 15,515.40-21,411.41-8,441.82

Finding the Fourth Proportional to 15,515.40, 21,411.41 and 8,441.82

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Solution

The fourth proportional to 15,515.40, 21,411.41 and 8,441.82 is: 11,649.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.40 : 21,411.41 = 8,441.82 : x
  2. Step 2: Convert to fraction form
    15,515.40/21,411.41 = 8,441.82/x
  3. Step 3: Cross multiply
    15,515.40x = 21,411.41 × 8,441.82
  4. Step 4: Simplify right side
    15,515.40x = 180,751,298.18
  5. Step 5: Solve for x
    x = 180,751,298.18/15,515.40
  6. Step 6: Final answer
    x = 11,649.80

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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.