Home / 21,870.90-30,184.50-12,314.37

Finding the Fourth Proportional to 21,870.90, 30,184.50 and 12,314.37

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Solution

The fourth proportional to 21,870.90, 30,184.50 and 12,314.37 is: 16,995.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,870.90 : 30,184.50 = 12,314.37 : x
  2. Step 2: Convert to fraction form
    21,870.90/30,184.50 = 12,314.37/x
  3. Step 3: Cross multiply
    21,870.90x = 30,184.50 × 12,314.37
  4. Step 4: Simplify right side
    21,870.90x = 371,703,101.27
  5. Step 5: Solve for x
    x = 371,703,101.27/21,870.90
  6. Step 6: Final answer
    x = 16,995.33

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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.