Home / 11,455.76-15,809.57-6,421.61

Finding the Fourth Proportional to 11,455.76, 15,809.57 and 6,421.61

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Solution

The fourth proportional to 11,455.76, 15,809.57 and 6,421.61 is: 8,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,455.76 : 15,809.57 = 6,421.61 : x
  2. Step 2: Convert to fraction form
    11,455.76/15,809.57 = 6,421.61/x
  3. Step 3: Cross multiply
    11,455.76x = 15,809.57 × 6,421.61
  4. Step 4: Simplify right side
    11,455.76x = 101,522,829.81
  5. Step 5: Solve for x
    x = 101,522,829.81/11,455.76
  6. Step 6: Final answer
    x = 8,862.16

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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.