Home / 20,656.80-28,506.47-11,225.30

Finding the Fourth Proportional to 20,656.80, 28,506.47 and 11,225.30

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Solution

The fourth proportional to 20,656.80, 28,506.47 and 11,225.30 is: 15,490.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.80 : 28,506.47 = 11,225.30 : x
  2. Step 2: Convert to fraction form
    20,656.80/28,506.47 = 11,225.30/x
  3. Step 3: Cross multiply
    20,656.80x = 28,506.47 × 11,225.30
  4. Step 4: Simplify right side
    20,656.80x = 319,993,479.03
  5. Step 5: Solve for x
    x = 319,993,479.03/20,656.80
  6. Step 6: Final answer
    x = 15,490.95

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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.