Home / 15,088.69-20,819.36-9,120.70

Finding the Fourth Proportional to 15,088.69, 20,819.36 and 9,120.70

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Solution

The fourth proportional to 15,088.69, 20,819.36 and 9,120.70 is: 12,584.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,088.69 : 20,819.36 = 9,120.70 : x
  2. Step 2: Convert to fraction form
    15,088.69/20,819.36 = 9,120.70/x
  3. Step 3: Cross multiply
    15,088.69x = 20,819.36 × 9,120.70
  4. Step 4: Simplify right side
    15,088.69x = 189,887,185.58
  5. Step 5: Solve for x
    x = 189,887,185.58/15,088.69
  6. Step 6: Final answer
    x = 12,584.74

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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.