Home / 20,270.30-27,968.02-12,312.05

Finding the Fourth Proportional to 20,270.30, 27,968.02 and 12,312.05

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Solution

The fourth proportional to 20,270.30, 27,968.02 and 12,312.05 is: 16,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.30 : 27,968.02 = 12,312.05 : x
  2. Step 2: Convert to fraction form
    20,270.30/27,968.02 = 12,312.05/x
  3. Step 3: Cross multiply
    20,270.30x = 27,968.02 × 12,312.05
  4. Step 4: Simplify right side
    20,270.30x = 344,343,490.02
  5. Step 5: Solve for x
    x = 344,343,490.02/20,270.30
  6. Step 6: Final answer
    x = 16,987.59

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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.