Home / 11,215.32-15,478.47-6,499.86

Finding the Fourth Proportional to 11,215.32, 15,478.47 and 6,499.86

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Solution

The fourth proportional to 11,215.32, 15,478.47 and 6,499.86 is: 8,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.32 : 15,478.47 = 6,499.86 : x
  2. Step 2: Convert to fraction form
    11,215.32/15,478.47 = 6,499.86/x
  3. Step 3: Cross multiply
    11,215.32x = 15,478.47 × 6,499.86
  4. Step 4: Simplify right side
    11,215.32x = 100,607,888.01
  5. Step 5: Solve for x
    x = 100,607,888.01/11,215.32
  6. Step 6: Final answer
    x = 8,970.58

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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.