Home / 20,345.08-28,074.60-11,390.50

Finding the Fourth Proportional to 20,345.08, 28,074.60 and 11,390.50

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Solution

The fourth proportional to 20,345.08, 28,074.60 and 11,390.50 is: 15,717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.08 : 28,074.60 = 11,390.50 : x
  2. Step 2: Convert to fraction form
    20,345.08/28,074.60 = 11,390.50/x
  3. Step 3: Cross multiply
    20,345.08x = 28,074.60 × 11,390.50
  4. Step 4: Simplify right side
    20,345.08x = 319,783,731.30
  5. Step 5: Solve for x
    x = 319,783,731.30/20,345.08
  6. Step 6: Final answer
    x = 15,717.99

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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.