Home / 13,787.18-19,026.51-8,478.86

Finding the Fourth Proportional to 13,787.18, 19,026.51 and 8,478.86

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Solution

The fourth proportional to 13,787.18, 19,026.51 and 8,478.86 is: 11,700.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,787.18 : 19,026.51 = 8,478.86 : x
  2. Step 2: Convert to fraction form
    13,787.18/19,026.51 = 8,478.86/x
  3. Step 3: Cross multiply
    13,787.18x = 19,026.51 × 8,478.86
  4. Step 4: Simplify right side
    13,787.18x = 161,323,114.58
  5. Step 5: Solve for x
    x = 161,323,114.58/13,787.18
  6. Step 6: Final answer
    x = 11,700.95

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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.