Home / 15,309.80-21,126.98-9,351.44

Finding the Fourth Proportional to 15,309.80, 21,126.98 and 9,351.44

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Solution

The fourth proportional to 15,309.80, 21,126.98 and 9,351.44 is: 12,904.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.80 : 21,126.98 = 9,351.44 : x
  2. Step 2: Convert to fraction form
    15,309.80/21,126.98 = 9,351.44/x
  3. Step 3: Cross multiply
    15,309.80x = 21,126.98 × 9,351.44
  4. Step 4: Simplify right side
    15,309.80x = 197,567,533.46
  5. Step 5: Solve for x
    x = 197,567,533.46/15,309.80
  6. Step 6: Final answer
    x = 12,904.65

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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.