Home / 15,565.15-21,479.80-8,850.78

Finding the Fourth Proportional to 15,565.15, 21,479.80 and 8,850.78

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Solution

The fourth proportional to 15,565.15, 21,479.80 and 8,850.78 is: 12,214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,565.15 : 21,479.80 = 8,850.78 : x
  2. Step 2: Convert to fraction form
    15,565.15/21,479.80 = 8,850.78/x
  3. Step 3: Cross multiply
    15,565.15x = 21,479.80 × 8,850.78
  4. Step 4: Simplify right side
    15,565.15x = 190,112,955.84
  5. Step 5: Solve for x
    x = 190,112,955.84/15,565.15
  6. Step 6: Final answer
    x = 12,214.01

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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.