Home / 28,455.87-42,678.99-10,440.39

Finding the Fourth Proportional to 28,455.87, 42,678.99 and 10,440.39

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Solution

The fourth proportional to 28,455.87, 42,678.99 and 10,440.39 is: 15,658.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.87 : 42,678.99 = 10,440.39 : x
  2. Step 2: Convert to fraction form
    28,455.87/42,678.99 = 10,440.39/x
  3. Step 3: Cross multiply
    28,455.87x = 42,678.99 × 10,440.39
  4. Step 4: Simplify right side
    28,455.87x = 445,585,300.41
  5. Step 5: Solve for x
    x = 445,585,300.41/28,455.87
  6. Step 6: Final answer
    x = 15,658.82

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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.