Home / 21,866.87-30,177.80-12,307.67

Finding the Fourth Proportional to 21,866.87, 30,177.80 and 12,307.67

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Solution

The fourth proportional to 21,866.87, 30,177.80 and 12,307.67 is: 16,985.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.87 : 30,177.80 = 12,307.67 : x
  2. Step 2: Convert to fraction form
    21,866.87/30,177.80 = 12,307.67/x
  3. Step 3: Cross multiply
    21,866.87x = 30,177.80 × 12,307.67
  4. Step 4: Simplify right side
    21,866.87x = 371,418,191.30
  5. Step 5: Solve for x
    x = 371,418,191.30/21,866.87
  6. Step 6: Final answer
    x = 16,985.43

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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.