Home / 15,431.26-21,294.75-8,717.59

Finding the Fourth Proportional to 15,431.26, 21,294.75 and 8,717.59

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Solution

The fourth proportional to 15,431.26, 21,294.75 and 8,717.59 is: 12,030.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.26 : 21,294.75 = 8,717.59 : x
  2. Step 2: Convert to fraction form
    15,431.26/21,294.75 = 8,717.59/x
  3. Step 3: Cross multiply
    15,431.26x = 21,294.75 × 8,717.59
  4. Step 4: Simplify right side
    15,431.26x = 185,638,899.65
  5. Step 5: Solve for x
    x = 185,638,899.65/15,431.26
  6. Step 6: Final answer
    x = 12,030.05

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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.