Home / 21,882.19-30,197.81-12,929.67

Finding the Fourth Proportional to 21,882.19, 30,197.81 and 12,929.67

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Solution

The fourth proportional to 21,882.19, 30,197.81 and 12,929.67 is: 17,843.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,882.19 : 30,197.81 = 12,929.67 : x
  2. Step 2: Convert to fraction form
    21,882.19/30,197.81 = 12,929.67/x
  3. Step 3: Cross multiply
    21,882.19x = 30,197.81 × 12,929.67
  4. Step 4: Simplify right side
    21,882.19x = 390,447,718.02
  5. Step 5: Solve for x
    x = 390,447,718.02/21,882.19
  6. Step 6: Final answer
    x = 17,843.17

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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.