Home / 21,059.68-31,578.48-10,518.40

Finding the Fourth Proportional to 21,059.68, 31,578.48 and 10,518.40

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Solution

The fourth proportional to 21,059.68, 31,578.48 and 10,518.40 is: 15,772.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,059.68 : 31,578.48 = 10,518.40 : x
  2. Step 2: Convert to fraction form
    21,059.68/31,578.48 = 10,518.40/x
  3. Step 3: Cross multiply
    21,059.68x = 31,578.48 × 10,518.40
  4. Step 4: Simplify right side
    21,059.68x = 332,155,084.03
  5. Step 5: Solve for x
    x = 332,155,084.03/21,059.68
  6. Step 6: Final answer
    x = 15,772.09

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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.