Home / 20,881.95-31,333.69-13,866.81

Finding the Fourth Proportional to 20,881.95, 31,333.69 and 13,866.81

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Solution

The fourth proportional to 20,881.95, 31,333.69 and 13,866.81 is: 20,807.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.95 : 31,333.69 = 13,866.81 : x
  2. Step 2: Convert to fraction form
    20,881.95/31,333.69 = 13,866.81/x
  3. Step 3: Cross multiply
    20,881.95x = 31,333.69 × 13,866.81
  4. Step 4: Simplify right side
    20,881.95x = 434,498,225.66
  5. Step 5: Solve for x
    x = 434,498,225.66/20,881.95
  6. Step 6: Final answer
    x = 20,807.36

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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.