Home / 15,130.08-20,879.72-9,162.30

Finding the Fourth Proportional to 15,130.08, 20,879.72 and 9,162.30

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Solution

The fourth proportional to 15,130.08, 20,879.72 and 9,162.30 is: 12,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.08 : 20,879.72 = 9,162.30 : x
  2. Step 2: Convert to fraction form
    15,130.08/20,879.72 = 9,162.30/x
  3. Step 3: Cross multiply
    15,130.08x = 20,879.72 × 9,162.30
  4. Step 4: Simplify right side
    15,130.08x = 191,306,212.74
  5. Step 5: Solve for x
    x = 191,306,212.74/15,130.08
  6. Step 6: Final answer
    x = 12,644.10

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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.