Home / 10,129.86-13,979.18-5,653.46

Finding the Fourth Proportional to 10,129.86, 13,979.18 and 5,653.46

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Solution

The fourth proportional to 10,129.86, 13,979.18 and 5,653.46 is: 7,801.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.86 : 13,979.18 = 5,653.46 : x
  2. Step 2: Convert to fraction form
    10,129.86/13,979.18 = 5,653.46/x
  3. Step 3: Cross multiply
    10,129.86x = 13,979.18 × 5,653.46
  4. Step 4: Simplify right side
    10,129.86x = 79,030,734.96
  5. Step 5: Solve for x
    x = 79,030,734.96/10,129.86
  6. Step 6: Final answer
    x = 7,801.76

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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.