Home / 12,480.08-18,639.21-11,307.74

Finding the Fourth Proportional to 12,480.08, 18,639.21 and 11,307.74

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Solution

The fourth proportional to 12,480.08, 18,639.21 and 11,307.74 is: 16,888.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.08 : 18,639.21 = 11,307.74 : x
  2. Step 2: Convert to fraction form
    12,480.08/18,639.21 = 11,307.74/x
  3. Step 3: Cross multiply
    12,480.08x = 18,639.21 × 11,307.74
  4. Step 4: Simplify right side
    12,480.08x = 210,767,283.95
  5. Step 5: Solve for x
    x = 210,767,283.95/12,480.08
  6. Step 6: Final answer
    x = 16,888.30

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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.