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Finding the Fourth Proportional to 14,355.79, 19,807.95 and 8,689.42

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Solution

The fourth proportional to 14,355.79, 19,807.95 and 8,689.42 is: 11,989.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,355.79 : 19,807.95 = 8,689.42 : x
  2. Step 2: Convert to fraction form
    14,355.79/19,807.95 = 8,689.42/x
  3. Step 3: Cross multiply
    14,355.79x = 19,807.95 × 8,689.42
  4. Step 4: Simplify right side
    14,355.79x = 172,119,596.89
  5. Step 5: Solve for x
    x = 172,119,596.89/14,355.79
  6. Step 6: Final answer
    x = 11,989.56

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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.