Home / 19,989.27-29,983.76-8,140.25

Finding the Fourth Proportional to 19,989.27, 29,983.76 and 8,140.25

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Solution

The fourth proportional to 19,989.27, 29,983.76 and 8,140.25 is: 12,210.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.27 : 29,983.76 = 8,140.25 : x
  2. Step 2: Convert to fraction form
    19,989.27/29,983.76 = 8,140.25/x
  3. Step 3: Cross multiply
    19,989.27x = 29,983.76 × 8,140.25
  4. Step 4: Simplify right side
    19,989.27x = 244,075,367.12
  5. Step 5: Solve for x
    x = 244,075,367.12/19,989.27
  6. Step 6: Final answer
    x = 12,210.32

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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.