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Finding the Fourth Proportional to 15,060.71, 20,783.96 and 8,346.45

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Solution

The fourth proportional to 15,060.71, 20,783.96 and 8,346.45 is: 11,518.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,060.71 : 20,783.96 = 8,346.45 : x
  2. Step 2: Convert to fraction form
    15,060.71/20,783.96 = 8,346.45/x
  3. Step 3: Cross multiply
    15,060.71x = 20,783.96 × 8,346.45
  4. Step 4: Simplify right side
    15,060.71x = 173,472,282.94
  5. Step 5: Solve for x
    x = 173,472,282.94/15,060.71
  6. Step 6: Final answer
    x = 11,518.20

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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.