Home / 21,761.16-30,030.40-12,329.72

Finding the Fourth Proportional to 21,761.16, 30,030.40 and 12,329.72

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Solution

The fourth proportional to 21,761.16, 30,030.40 and 12,329.72 is: 17,015.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.16 : 30,030.40 = 12,329.72 : x
  2. Step 2: Convert to fraction form
    21,761.16/30,030.40 = 12,329.72/x
  3. Step 3: Cross multiply
    21,761.16x = 30,030.40 × 12,329.72
  4. Step 4: Simplify right side
    21,761.16x = 370,266,332.01
  5. Step 5: Solve for x
    x = 370,266,332.01/21,761.16
  6. Step 6: Final answer
    x = 17,015.01

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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.