Home / 20,970.40-31,448.96-6,927.84

Finding the Fourth Proportional to 20,970.40, 31,448.96 and 6,927.84

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Solution

The fourth proportional to 20,970.40, 31,448.96 and 6,927.84 is: 10,389.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.40 : 31,448.96 = 6,927.84 : x
  2. Step 2: Convert to fraction form
    20,970.40/31,448.96 = 6,927.84/x
  3. Step 3: Cross multiply
    20,970.40x = 31,448.96 × 6,927.84
  4. Step 4: Simplify right side
    20,970.40x = 217,873,363.05
  5. Step 5: Solve for x
    x = 217,873,363.05/20,970.40
  6. Step 6: Final answer
    x = 10,389.57

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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.