Home / 7,215.24-9,955-4,828.72

Finding the Fourth Proportional to 7,215.24, 9,955 and 4,828.72

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Solution

The fourth proportional to 7,215.24, 9,955 and 4,828.72 is: 6,662.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.24 : 9,955 = 4,828.72 : x
  2. Step 2: Convert to fraction form
    7,215.24/9,955 = 4,828.72/x
  3. Step 3: Cross multiply
    7,215.24x = 9,955 × 4,828.72
  4. Step 4: Simplify right side
    7,215.24x = 48,069,907.60
  5. Step 5: Solve for x
    x = 48,069,907.60/7,215.24
  6. Step 6: Final answer
    x = 6,662.27

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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.