Home / 15,612.81-21,545.14-8,900.60

Finding the Fourth Proportional to 15,612.81, 21,545.14 and 8,900.60

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Solution

The fourth proportional to 15,612.81, 21,545.14 and 8,900.60 is: 12,282.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,612.81 : 21,545.14 = 8,900.60 : x
  2. Step 2: Convert to fraction form
    15,612.81/21,545.14 = 8,900.60/x
  3. Step 3: Cross multiply
    15,612.81x = 21,545.14 × 8,900.60
  4. Step 4: Simplify right side
    15,612.81x = 191,764,620.39
  5. Step 5: Solve for x
    x = 191,764,620.39/15,612.81
  6. Step 6: Final answer
    x = 12,282.52

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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.