Home / 12,809.52-19,225.26-9,120.78

Finding the Fourth Proportional to 12,809.52, 19,225.26 and 9,120.78

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Solution

The fourth proportional to 12,809.52, 19,225.26 and 9,120.78 is: 13,688.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.52 : 19,225.26 = 9,120.78 : x
  2. Step 2: Convert to fraction form
    12,809.52/19,225.26 = 9,120.78/x
  3. Step 3: Cross multiply
    12,809.52x = 19,225.26 × 9,120.78
  4. Step 4: Simplify right side
    12,809.52x = 175,349,366.90
  5. Step 5: Solve for x
    x = 175,349,366.90/12,809.52
  6. Step 6: Final answer
    x = 13,688.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.