Home / 15,231.60-21,012.84-9,925.20

Finding the Fourth Proportional to 15,231.60, 21,012.84 and 9,925.20

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Solution

The fourth proportional to 15,231.60, 21,012.84 and 9,925.20 is: 13,692.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.60 : 21,012.84 = 9,925.20 : x
  2. Step 2: Convert to fraction form
    15,231.60/21,012.84 = 9,925.20/x
  3. Step 3: Cross multiply
    15,231.60x = 21,012.84 × 9,925.20
  4. Step 4: Simplify right side
    15,231.60x = 208,556,639.57
  5. Step 5: Solve for x
    x = 208,556,639.57/15,231.60
  6. Step 6: Final answer
    x = 13,692.37

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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.