Home / 20,871.90-28,814.31-14,193.18

Finding the Fourth Proportional to 20,871.90, 28,814.31 and 14,193.18

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Solution

The fourth proportional to 20,871.90, 28,814.31 and 14,193.18 is: 19,594.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.90 : 28,814.31 = 14,193.18 : x
  2. Step 2: Convert to fraction form
    20,871.90/28,814.31 = 14,193.18/x
  3. Step 3: Cross multiply
    20,871.90x = 28,814.31 × 14,193.18
  4. Step 4: Simplify right side
    20,871.90x = 408,966,688.41
  5. Step 5: Solve for x
    x = 408,966,688.41/20,871.90
  6. Step 6: Final answer
    x = 19,594.13

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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.