Home / 7,578.40-10,455.12-5,477.92

Finding the Fourth Proportional to 7,578.40, 10,455.12 and 5,477.92

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Solution

The fourth proportional to 7,578.40, 10,455.12 and 5,477.92 is: 7,557.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,578.40 : 10,455.12 = 5,477.92 : x
  2. Step 2: Convert to fraction form
    7,578.40/10,455.12 = 5,477.92/x
  3. Step 3: Cross multiply
    7,578.40x = 10,455.12 × 5,477.92
  4. Step 4: Simplify right side
    7,578.40x = 57,272,310.95
  5. Step 5: Solve for x
    x = 57,272,310.95/7,578.40
  6. Step 6: Final answer
    x = 7,557.31

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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.