Home / 15,311.89-21,132.72-9,347.03

Finding the Fourth Proportional to 15,311.89, 21,132.72 and 9,347.03

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Solution

The fourth proportional to 15,311.89, 21,132.72 and 9,347.03 is: 12,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.89 : 21,132.72 = 9,347.03 : x
  2. Step 2: Convert to fraction form
    15,311.89/21,132.72 = 9,347.03/x
  3. Step 3: Cross multiply
    15,311.89x = 21,132.72 × 9,347.03
  4. Step 4: Simplify right side
    15,311.89x = 197,528,167.82
  5. Step 5: Solve for x
    x = 197,528,167.82/15,311.89
  6. Step 6: Final answer
    x = 12,900.31

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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.