Home / 20,969.60-31,428.48-10,575.68

Finding the Fourth Proportional to 20,969.60, 31,428.48 and 10,575.68

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Solution

The fourth proportional to 20,969.60, 31,428.48 and 10,575.68 is: 15,850.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.60 : 31,428.48 = 10,575.68 : x
  2. Step 2: Convert to fraction form
    20,969.60/31,428.48 = 10,575.68/x
  3. Step 3: Cross multiply
    20,969.60x = 31,428.48 × 10,575.68
  4. Step 4: Simplify right side
    20,969.60x = 332,377,547.37
  5. Step 5: Solve for x
    x = 332,377,547.37/20,969.60
  6. Step 6: Final answer
    x = 15,850.45

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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.