Home / 12,880.20-17,776.16-7,216.48

Finding the Fourth Proportional to 12,880.20, 17,776.16 and 7,216.48

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Solution

The fourth proportional to 12,880.20, 17,776.16 and 7,216.48 is: 9,959.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,880.20 : 17,776.16 = 7,216.48 : x
  2. Step 2: Convert to fraction form
    12,880.20/17,776.16 = 7,216.48/x
  3. Step 3: Cross multiply
    12,880.20x = 17,776.16 × 7,216.48
  4. Step 4: Simplify right side
    12,880.20x = 128,281,303.12
  5. Step 5: Solve for x
    x = 128,281,303.12/12,880.20
  6. Step 6: Final answer
    x = 9,959.57

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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.