Home / 15,678.34-21,635.13-8,604.71

Finding the Fourth Proportional to 15,678.34, 21,635.13 and 8,604.71

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Solution

The fourth proportional to 15,678.34, 21,635.13 and 8,604.71 is: 11,873.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.34 : 21,635.13 = 8,604.71 : x
  2. Step 2: Convert to fraction form
    15,678.34/21,635.13 = 8,604.71/x
  3. Step 3: Cross multiply
    15,678.34x = 21,635.13 × 8,604.71
  4. Step 4: Simplify right side
    15,678.34x = 186,164,024.69
  5. Step 5: Solve for x
    x = 186,164,024.69/15,678.34
  6. Step 6: Final answer
    x = 11,873.96

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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.