Home / 11,315.39-15,615.40-6,279.93

Finding the Fourth Proportional to 11,315.39, 15,615.40 and 6,279.93

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Solution

The fourth proportional to 11,315.39, 15,615.40 and 6,279.93 is: 8,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.39 : 15,615.40 = 6,279.93 : x
  2. Step 2: Convert to fraction form
    11,315.39/15,615.40 = 6,279.93/x
  3. Step 3: Cross multiply
    11,315.39x = 15,615.40 × 6,279.93
  4. Step 4: Simplify right side
    11,315.39x = 98,063,603.22
  5. Step 5: Solve for x
    x = 98,063,603.22/11,315.39
  6. Step 6: Final answer
    x = 8,666.40

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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.