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Finding the Fourth Proportional to 19,225.10, 28,840.72 and 7,378.39

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Solution

The fourth proportional to 19,225.10, 28,840.72 and 7,378.39 is: 11,068.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,225.10 : 28,840.72 = 7,378.39 : x
  2. Step 2: Convert to fraction form
    19,225.10/28,840.72 = 7,378.39/x
  3. Step 3: Cross multiply
    19,225.10x = 28,840.72 × 7,378.39
  4. Step 4: Simplify right side
    19,225.10x = 212,798,121.86
  5. Step 5: Solve for x
    x = 212,798,121.86/19,225.10
  6. Step 6: Final answer
    x = 11,068.77

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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.