Home / 11,315.64-15,615.60-6,279.72

Finding the Fourth Proportional to 11,315.64, 15,615.60 and 6,279.72

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Solution

The fourth proportional to 11,315.64, 15,615.60 and 6,279.72 is: 8,666.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.64 : 15,615.60 = 6,279.72 : x
  2. Step 2: Convert to fraction form
    11,315.64/15,615.60 = 6,279.72/x
  3. Step 3: Cross multiply
    11,315.64x = 15,615.60 × 6,279.72
  4. Step 4: Simplify right side
    11,315.64x = 98,061,595.63
  5. Step 5: Solve for x
    x = 98,061,595.63/11,315.64
  6. Step 6: Final answer
    x = 8,666.02

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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.