Home / 20,697.81-28,565.51-11,748.12

Finding the Fourth Proportional to 20,697.81, 28,565.51 and 11,748.12

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Solution

The fourth proportional to 20,697.81, 28,565.51 and 11,748.12 is: 16,213.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.81 : 28,565.51 = 11,748.12 : x
  2. Step 2: Convert to fraction form
    20,697.81/28,565.51 = 11,748.12/x
  3. Step 3: Cross multiply
    20,697.81x = 28,565.51 × 11,748.12
  4. Step 4: Simplify right side
    20,697.81x = 335,590,980.60
  5. Step 5: Solve for x
    x = 335,590,980.60/20,697.81
  6. Step 6: Final answer
    x = 16,213.84

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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.