Home / 21,117.11-31,684.13-7,973.21

Finding the Fourth Proportional to 21,117.11, 31,684.13 and 7,973.21

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Solution

The fourth proportional to 21,117.11, 31,684.13 and 7,973.21 is: 11,963.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.11 : 31,684.13 = 7,973.21 : x
  2. Step 2: Convert to fraction form
    21,117.11/31,684.13 = 7,973.21/x
  3. Step 3: Cross multiply
    21,117.11x = 31,684.13 × 7,973.21
  4. Step 4: Simplify right side
    21,117.11x = 252,624,222.16
  5. Step 5: Solve for x
    x = 252,624,222.16/21,117.11
  6. Step 6: Final answer
    x = 11,963.01

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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.