Home / 19,681.18-29,522.16-7,986.40

Finding the Fourth Proportional to 19,681.18, 29,522.16 and 7,986.40

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Solution

The fourth proportional to 19,681.18, 29,522.16 and 7,986.40 is: 11,979.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,681.18 : 29,522.16 = 7,986.40 : x
  2. Step 2: Convert to fraction form
    19,681.18/29,522.16 = 7,986.40/x
  3. Step 3: Cross multiply
    19,681.18x = 29,522.16 × 7,986.40
  4. Step 4: Simplify right side
    19,681.18x = 235,775,778.62
  5. Step 5: Solve for x
    x = 235,775,778.62/19,681.18
  6. Step 6: Final answer
    x = 11,979.76

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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.