Home / 7,478.01-10,319.31-4,120.65

Finding the Fourth Proportional to 7,478.01, 10,319.31 and 4,120.65

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Solution

The fourth proportional to 7,478.01, 10,319.31 and 4,120.65 is: 5,686.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,478.01 : 10,319.31 = 4,120.65 : x
  2. Step 2: Convert to fraction form
    7,478.01/10,319.31 = 4,120.65/x
  3. Step 3: Cross multiply
    7,478.01x = 10,319.31 × 4,120.65
  4. Step 4: Simplify right side
    7,478.01x = 42,522,264.75
  5. Step 5: Solve for x
    x = 42,522,264.75/7,478.01
  6. Step 6: Final answer
    x = 5,686.31

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Double scale
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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.