Home / 13,959.90-20,781.54-13,885.98

Finding the Fourth Proportional to 13,959.90, 20,781.54 and 13,885.98

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Solution

The fourth proportional to 13,959.90, 20,781.54 and 13,885.98 is: 20,671.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.90 : 20,781.54 = 13,885.98 : x
  2. Step 2: Convert to fraction form
    13,959.90/20,781.54 = 13,885.98/x
  3. Step 3: Cross multiply
    13,959.90x = 20,781.54 × 13,885.98
  4. Step 4: Simplify right side
    13,959.90x = 288,572,048.81
  5. Step 5: Solve for x
    x = 288,572,048.81/13,959.90
  6. Step 6: Final answer
    x = 20,671.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.