Home / 15,289.20-21,103.47-9,005.22

Finding the Fourth Proportional to 15,289.20, 21,103.47 and 9,005.22

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Solution

The fourth proportional to 15,289.20, 21,103.47 and 9,005.22 is: 12,429.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.20 : 21,103.47 = 9,005.22 : x
  2. Step 2: Convert to fraction form
    15,289.20/21,103.47 = 9,005.22/x
  3. Step 3: Cross multiply
    15,289.20x = 21,103.47 × 9,005.22
  4. Step 4: Simplify right side
    15,289.20x = 190,041,390.11
  5. Step 5: Solve for x
    x = 190,041,390.11/15,289.20
  6. Step 6: Final answer
    x = 12,429.78

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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.