Home / 21,420.54-29,554.74-12,343.68

Finding the Fourth Proportional to 21,420.54, 29,554.74 and 12,343.68

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Solution

The fourth proportional to 21,420.54, 29,554.74 and 12,343.68 is: 17,031.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.54 : 29,554.74 = 12,343.68 : x
  2. Step 2: Convert to fraction form
    21,420.54/29,554.74 = 12,343.68/x
  3. Step 3: Cross multiply
    21,420.54x = 29,554.74 × 12,343.68
  4. Step 4: Simplify right side
    21,420.54x = 364,814,253.04
  5. Step 5: Solve for x
    x = 364,814,253.04/21,420.54
  6. Step 6: Final answer
    x = 17,031.05

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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.