Home / 15,406.48-21,263.20-9,120.88

Finding the Fourth Proportional to 15,406.48, 21,263.20 and 9,120.88

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Solution

The fourth proportional to 15,406.48, 21,263.20 and 9,120.88 is: 12,588.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,406.48 : 21,263.20 = 9,120.88 : x
  2. Step 2: Convert to fraction form
    15,406.48/21,263.20 = 9,120.88/x
  3. Step 3: Cross multiply
    15,406.48x = 21,263.20 × 9,120.88
  4. Step 4: Simplify right side
    15,406.48x = 193,939,095.62
  5. Step 5: Solve for x
    x = 193,939,095.62/15,406.48
  6. Step 6: Final answer
    x = 12,588.15

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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.