Home / 14,152.40-21,228.60-13,787.90

Finding the Fourth Proportional to 14,152.40, 21,228.60 and 13,787.90

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Solution

The fourth proportional to 14,152.40, 21,228.60 and 13,787.90 is: 20,681.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,152.40 : 21,228.60 = 13,787.90 : x
  2. Step 2: Convert to fraction form
    14,152.40/21,228.60 = 13,787.90/x
  3. Step 3: Cross multiply
    14,152.40x = 21,228.60 × 13,787.90
  4. Step 4: Simplify right side
    14,152.40x = 292,697,813.94
  5. Step 5: Solve for x
    x = 292,697,813.94/14,152.40
  6. Step 6: Final answer
    x = 20,681.85

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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.