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Finding the Fourth Proportional to 7,086,643.65, 9,779,565.65 and 3,867,379.65

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Solution

The fourth proportional to 7,086,643.65, 9,779,565.65 and 3,867,379.65 is: 5,336,982.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086,643.65 : 9,779,565.65 = 3,867,379.65 : x
  2. Step 2: Convert to fraction form
    7,086,643.65/9,779,565.65 = 3,867,379.65/x
  3. Step 3: Cross multiply
    7,086,643.65x = 9,779,565.65 × 3,867,379.65
  4. Step 4: Simplify right side
    7,086,643.65x = 37,821,293,161,312.12
  5. Step 5: Solve for x
    x = 37,821,293,161,312.12/7,086,643.65
  6. Step 6: Final answer
    x = 5,336,982.50

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Double scale
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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.