Home / 20,770.31-31,162.75-12,970.01

Finding the Fourth Proportional to 20,770.31, 31,162.75 and 12,970.01

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Solution

The fourth proportional to 20,770.31, 31,162.75 and 12,970.01 is: 19,459.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.31 : 31,162.75 = 12,970.01 : x
  2. Step 2: Convert to fraction form
    20,770.31/31,162.75 = 12,970.01/x
  3. Step 3: Cross multiply
    20,770.31x = 31,162.75 × 12,970.01
  4. Step 4: Simplify right side
    20,770.31x = 404,181,180.71
  5. Step 5: Solve for x
    x = 404,181,180.71/20,770.31
  6. Step 6: Final answer
    x = 19,459.57

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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.