Home / 20,518.16-28,314.72-11,565.68

Finding the Fourth Proportional to 20,518.16, 28,314.72 and 11,565.68

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Solution

The fourth proportional to 20,518.16, 28,314.72 and 11,565.68 is: 15,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.16 : 28,314.72 = 11,565.68 : x
  2. Step 2: Convert to fraction form
    20,518.16/28,314.72 = 11,565.68/x
  3. Step 3: Cross multiply
    20,518.16x = 28,314.72 × 11,565.68
  4. Step 4: Simplify right side
    20,518.16x = 327,478,990.81
  5. Step 5: Solve for x
    x = 327,478,990.81/20,518.16
  6. Step 6: Final answer
    x = 15,960.45

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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.