Home / 21,367.68-29,492.64-12,989.76

Finding the Fourth Proportional to 21,367.68, 29,492.64 and 12,989.76

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Solution

The fourth proportional to 21,367.68, 29,492.64 and 12,989.76 is: 17,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,367.68 : 29,492.64 = 12,989.76 : x
  2. Step 2: Convert to fraction form
    21,367.68/29,492.64 = 12,989.76/x
  3. Step 3: Cross multiply
    21,367.68x = 29,492.64 × 12,989.76
  4. Step 4: Simplify right side
    21,367.68x = 383,102,315.37
  5. Step 5: Solve for x
    x = 383,102,315.37/21,367.68
  6. Step 6: Final answer
    x = 17,929.06

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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.