Home / 15,688.89-21,651.12-8,975.61

Finding the Fourth Proportional to 15,688.89, 21,651.12 and 8,975.61

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Solution

The fourth proportional to 15,688.89, 21,651.12 and 8,975.61 is: 12,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.89 : 21,651.12 = 8,975.61 : x
  2. Step 2: Convert to fraction form
    15,688.89/21,651.12 = 8,975.61/x
  3. Step 3: Cross multiply
    15,688.89x = 21,651.12 × 8,975.61
  4. Step 4: Simplify right side
    15,688.89x = 194,332,009.18
  5. Step 5: Solve for x
    x = 194,332,009.18/15,688.89
  6. Step 6: Final answer
    x = 12,386.60

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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.