Home / 15,511.80-21,424.32-10,230.60

Finding the Fourth Proportional to 15,511.80, 21,424.32 and 10,230.60

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Solution

The fourth proportional to 15,511.80, 21,424.32 and 10,230.60 is: 14,130.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.80 : 21,424.32 = 10,230.60 : x
  2. Step 2: Convert to fraction form
    15,511.80/21,424.32 = 10,230.60/x
  3. Step 3: Cross multiply
    15,511.80x = 21,424.32 × 10,230.60
  4. Step 4: Simplify right side
    15,511.80x = 219,183,648.19
  5. Step 5: Solve for x
    x = 219,183,648.19/15,511.80
  6. Step 6: Final answer
    x = 14,130.12

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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.