Home / 21,367.36-29,492.16-12,981.76

Finding the Fourth Proportional to 21,367.36, 29,492.16 and 12,981.76

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Solution

The fourth proportional to 21,367.36, 29,492.16 and 12,981.76 is: 17,917.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,367.36 : 29,492.16 = 12,981.76 : x
  2. Step 2: Convert to fraction form
    21,367.36/29,492.16 = 12,981.76/x
  3. Step 3: Cross multiply
    21,367.36x = 29,492.16 × 12,981.76
  4. Step 4: Simplify right side
    21,367.36x = 382,860,143.00
  5. Step 5: Solve for x
    x = 382,860,143.00/21,367.36
  6. Step 6: Final answer
    x = 17,917.99

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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.