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Finding the Fourth Proportional to 7,124.76, 9,832.29 and 4,139.51

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Solution

The fourth proportional to 7,124.76, 9,832.29 and 4,139.51 is: 5,712.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.76 : 9,832.29 = 4,139.51 : x
  2. Step 2: Convert to fraction form
    7,124.76/9,832.29 = 4,139.51/x
  3. Step 3: Cross multiply
    7,124.76x = 9,832.29 × 4,139.51
  4. Step 4: Simplify right side
    7,124.76x = 40,700,798.09
  5. Step 5: Solve for x
    x = 40,700,798.09/7,124.76
  6. Step 6: Final answer
    x = 5,712.59

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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.