Home / 21,607.08-29,820.58-12,178.60

Finding the Fourth Proportional to 21,607.08, 29,820.58 and 12,178.60

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Solution

The fourth proportional to 21,607.08, 29,820.58 and 12,178.60 is: 16,808.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,607.08 : 29,820.58 = 12,178.60 : x
  2. Step 2: Convert to fraction form
    21,607.08/29,820.58 = 12,178.60/x
  3. Step 3: Cross multiply
    21,607.08x = 29,820.58 × 12,178.60
  4. Step 4: Simplify right side
    21,607.08x = 363,172,915.59
  5. Step 5: Solve for x
    x = 363,172,915.59/21,607.08
  6. Step 6: Final answer
    x = 16,808.05

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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.