Home / 15,500.16-21,394.80-9,216.72

Finding the Fourth Proportional to 15,500.16, 21,394.80 and 9,216.72

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Solution

The fourth proportional to 15,500.16, 21,394.80 and 9,216.72 is: 12,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,500.16 : 21,394.80 = 9,216.72 : x
  2. Step 2: Convert to fraction form
    15,500.16/21,394.80 = 9,216.72/x
  3. Step 3: Cross multiply
    15,500.16x = 21,394.80 × 9,216.72
  4. Step 4: Simplify right side
    15,500.16x = 197,189,881.06
  5. Step 5: Solve for x
    x = 197,189,881.06/15,500.16
  6. Step 6: Final answer
    x = 12,721.80

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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.