Home / 13,271.55-18,320.49-8,787.39

Finding the Fourth Proportional to 13,271.55, 18,320.49 and 8,787.39

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Solution

The fourth proportional to 13,271.55, 18,320.49 and 8,787.39 is: 12,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,271.55 : 18,320.49 = 8,787.39 : x
  2. Step 2: Convert to fraction form
    13,271.55/18,320.49 = 8,787.39/x
  3. Step 3: Cross multiply
    13,271.55x = 18,320.49 × 8,787.39
  4. Step 4: Simplify right side
    13,271.55x = 160,989,290.62
  5. Step 5: Solve for x
    x = 160,989,290.62/13,271.55
  6. Step 6: Final answer
    x = 12,130.41

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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.