Home / 11,315.16-15,615.29-6,279.75

Finding the Fourth Proportional to 11,315.16, 15,615.29 and 6,279.75

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Solution

The fourth proportional to 11,315.16, 15,615.29 and 6,279.75 is: 8,666.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.16 : 15,615.29 = 6,279.75 : x
  2. Step 2: Convert to fraction form
    11,315.16/15,615.29 = 6,279.75/x
  3. Step 3: Cross multiply
    11,315.16x = 15,615.29 × 6,279.75
  4. Step 4: Simplify right side
    11,315.16x = 98,060,085.98
  5. Step 5: Solve for x
    x = 98,060,085.98/11,315.16
  6. Step 6: Final answer
    x = 8,666.26

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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.