Home / 12,111.10-18,145.05-9,907.90

Finding the Fourth Proportional to 12,111.10, 18,145.05 and 9,907.90

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Solution

The fourth proportional to 12,111.10, 18,145.05 and 9,907.90 is: 14,844.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,111.10 : 18,145.05 = 9,907.90 : x
  2. Step 2: Convert to fraction form
    12,111.10/18,145.05 = 9,907.90/x
  3. Step 3: Cross multiply
    12,111.10x = 18,145.05 × 9,907.90
  4. Step 4: Simplify right side
    12,111.10x = 179,779,340.90
  5. Step 5: Solve for x
    x = 179,779,340.90/12,111.10
  6. Step 6: Final answer
    x = 14,844.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.