Home / 12,428.99-17,155.62-9,928.52

Finding the Fourth Proportional to 12,428.99, 17,155.62 and 9,928.52

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Solution

The fourth proportional to 12,428.99, 17,155.62 and 9,928.52 is: 13,704.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.99 : 17,155.62 = 9,928.52 : x
  2. Step 2: Convert to fraction form
    12,428.99/17,155.62 = 9,928.52/x
  3. Step 3: Cross multiply
    12,428.99x = 17,155.62 × 9,928.52
  4. Step 4: Simplify right side
    12,428.99x = 170,329,830.50
  5. Step 5: Solve for x
    x = 170,329,830.50/12,428.99
  6. Step 6: Final answer
    x = 13,704.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.