Home / 12,378.51-18,569.48-3,612.15

Finding the Fourth Proportional to 12,378.51, 18,569.48 and 3,612.15

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Solution

The fourth proportional to 12,378.51, 18,569.48 and 3,612.15 is: 5,418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.51 : 18,569.48 = 3,612.15 : x
  2. Step 2: Convert to fraction form
    12,378.51/18,569.48 = 3,612.15/x
  3. Step 3: Cross multiply
    12,378.51x = 18,569.48 × 3,612.15
  4. Step 4: Simplify right side
    12,378.51x = 67,075,729.12
  5. Step 5: Solve for x
    x = 67,075,729.12/12,378.51
  6. Step 6: Final answer
    x = 5,418.72

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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.