Home / 20,928.24-28,880.28-12,538.80

Finding the Fourth Proportional to 20,928.24, 28,880.28 and 12,538.80

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Solution

The fourth proportional to 20,928.24, 28,880.28 and 12,538.80 is: 17,303.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.24 : 28,880.28 = 12,538.80 : x
  2. Step 2: Convert to fraction form
    20,928.24/28,880.28 = 12,538.80/x
  3. Step 3: Cross multiply
    20,928.24x = 28,880.28 × 12,538.80
  4. Step 4: Simplify right side
    20,928.24x = 362,124,054.86
  5. Step 5: Solve for x
    x = 362,124,054.86/20,928.24
  6. Step 6: Final answer
    x = 17,303.13

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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.