Home / 7,319.40-10,979.10-3,428.16

Finding the Fourth Proportional to 7,319.40, 10,979.10 and 3,428.16

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Solution

The fourth proportional to 7,319.40, 10,979.10 and 3,428.16 is: 5,142.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319.40 : 10,979.10 = 3,428.16 : x
  2. Step 2: Convert to fraction form
    7,319.40/10,979.10 = 3,428.16/x
  3. Step 3: Cross multiply
    7,319.40x = 10,979.10 × 3,428.16
  4. Step 4: Simplify right side
    7,319.40x = 37,638,111.46
  5. Step 5: Solve for x
    x = 37,638,111.46/7,319.40
  6. Step 6: Final answer
    x = 5,142.24

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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.