Home / 15,435.79-21,300.13-8,722

Finding the Fourth Proportional to 15,435.79, 21,300.13 and 8,722

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Solution

The fourth proportional to 15,435.79, 21,300.13 and 8,722 is: 12,035.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.79 : 21,300.13 = 8,722 : x
  2. Step 2: Convert to fraction form
    15,435.79/21,300.13 = 8,722/x
  3. Step 3: Cross multiply
    15,435.79x = 21,300.13 × 8,722
  4. Step 4: Simplify right side
    15,435.79x = 185,779,690.25
  5. Step 5: Solve for x
    x = 185,779,690.25/15,435.79
  6. Step 6: Final answer
    x = 12,035.65

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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.