Home / 11,505.76-15,878.43-6,470.20

Finding the Fourth Proportional to 11,505.76, 15,878.43 and 6,470.20

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Solution

The fourth proportional to 11,505.76, 15,878.43 and 6,470.20 is: 8,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,505.76 : 15,878.43 = 6,470.20 : x
  2. Step 2: Convert to fraction form
    11,505.76/15,878.43 = 6,470.20/x
  3. Step 3: Cross multiply
    11,505.76x = 15,878.43 × 6,470.20
  4. Step 4: Simplify right side
    11,505.76x = 102,736,602.35
  5. Step 5: Solve for x
    x = 102,736,602.35/11,505.76
  6. Step 6: Final answer
    x = 8,929.15

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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.