Home / 12,966.85-19,319.72-12,118.15

Finding the Fourth Proportional to 12,966.85, 19,319.72 and 12,118.15

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Solution

The fourth proportional to 12,966.85, 19,319.72 and 12,118.15 is: 18,055.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,966.85 : 19,319.72 = 12,118.15 : x
  2. Step 2: Convert to fraction form
    12,966.85/19,319.72 = 12,118.15/x
  3. Step 3: Cross multiply
    12,966.85x = 19,319.72 × 12,118.15
  4. Step 4: Simplify right side
    12,966.85x = 234,119,264.92
  5. Step 5: Solve for x
    x = 234,119,264.92/12,966.85
  6. Step 6: Final answer
    x = 18,055.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.