Home / 20,948.99-31,416.81-6,906.40

Finding the Fourth Proportional to 20,948.99, 31,416.81 and 6,906.40

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Solution

The fourth proportional to 20,948.99, 31,416.81 and 6,906.40 is: 10,357.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.99 : 31,416.81 = 6,906.40 : x
  2. Step 2: Convert to fraction form
    20,948.99/31,416.81 = 6,906.40/x
  3. Step 3: Cross multiply
    20,948.99x = 31,416.81 × 6,906.40
  4. Step 4: Simplify right side
    20,948.99x = 216,977,056.58
  5. Step 5: Solve for x
    x = 216,977,056.58/20,948.99
  6. Step 6: Final answer
    x = 10,357.40

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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.