Home / 7,920.13-10,938.77-5,397.93

Finding the Fourth Proportional to 7,920.13, 10,938.77 and 5,397.93

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Solution

The fourth proportional to 7,920.13, 10,938.77 and 5,397.93 is: 7,455.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.13 : 10,938.77 = 5,397.93 : x
  2. Step 2: Convert to fraction form
    7,920.13/10,938.77 = 5,397.93/x
  3. Step 3: Cross multiply
    7,920.13x = 10,938.77 × 5,397.93
  4. Step 4: Simplify right side
    7,920.13x = 59,046,714.75
  5. Step 5: Solve for x
    x = 59,046,714.75/7,920.13
  6. Step 6: Final answer
    x = 7,455.27

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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.