Home / 21,738.61-29,999.13-12,307.09

Finding the Fourth Proportional to 21,738.61, 29,999.13 and 12,307.09

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Solution

The fourth proportional to 21,738.61, 29,999.13 and 12,307.09 is: 16,983.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,738.61 : 29,999.13 = 12,307.09 : x
  2. Step 2: Convert to fraction form
    21,738.61/29,999.13 = 12,307.09/x
  3. Step 3: Cross multiply
    21,738.61x = 29,999.13 × 12,307.09
  4. Step 4: Simplify right side
    21,738.61x = 369,201,931.30
  5. Step 5: Solve for x
    x = 369,201,931.30/21,738.61
  6. Step 6: Final answer
    x = 16,983.70

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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.