Home / 20,970.02-31,459.59-12,091.11

Finding the Fourth Proportional to 20,970.02, 31,459.59 and 12,091.11

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Solution

The fourth proportional to 20,970.02, 31,459.59 and 12,091.11 is: 18,139.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.02 : 31,459.59 = 12,091.11 : x
  2. Step 2: Convert to fraction form
    20,970.02/31,459.59 = 12,091.11/x
  3. Step 3: Cross multiply
    20,970.02x = 31,459.59 × 12,091.11
  4. Step 4: Simplify right side
    20,970.02x = 380,381,245.27
  5. Step 5: Solve for x
    x = 380,381,245.27/20,970.02
  6. Step 6: Final answer
    x = 18,139.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.