Home / 13,115.52-19,661.36-6,543.72

Finding the Fourth Proportional to 13,115.52, 19,661.36 and 6,543.72

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Solution

The fourth proportional to 13,115.52, 19,661.36 and 6,543.72 is: 9,809.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,115.52 : 19,661.36 = 6,543.72 : x
  2. Step 2: Convert to fraction form
    13,115.52/19,661.36 = 6,543.72/x
  3. Step 3: Cross multiply
    13,115.52x = 19,661.36 × 6,543.72
  4. Step 4: Simplify right side
    13,115.52x = 128,658,434.66
  5. Step 5: Solve for x
    x = 128,658,434.66/13,115.52
  6. Step 6: Final answer
    x = 9,809.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.