Home / 15,680.60-21,639.46-8,607.68

Finding the Fourth Proportional to 15,680.60, 21,639.46 and 8,607.68

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Solution

The fourth proportional to 15,680.60, 21,639.46 and 8,607.68 is: 11,878.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.60 : 21,639.46 = 8,607.68 : x
  2. Step 2: Convert to fraction form
    15,680.60/21,639.46 = 8,607.68/x
  3. Step 3: Cross multiply
    15,680.60x = 21,639.46 × 8,607.68
  4. Step 4: Simplify right side
    15,680.60x = 186,265,547.05
  5. Step 5: Solve for x
    x = 186,265,547.05/15,680.60
  6. Step 6: Final answer
    x = 11,878.73

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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.