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Finding the Fourth Proportional to 9,920.04, 14,870.94 and 4,921.32

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Solution

The fourth proportional to 9,920.04, 14,870.94 and 4,921.32 is: 7,377.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.04 : 14,870.94 = 4,921.32 : x
  2. Step 2: Convert to fraction form
    9,920.04/14,870.94 = 4,921.32/x
  3. Step 3: Cross multiply
    9,920.04x = 14,870.94 × 4,921.32
  4. Step 4: Simplify right side
    9,920.04x = 73,184,654.44
  5. Step 5: Solve for x
    x = 73,184,654.44/9,920.04
  6. Step 6: Final answer
    x = 7,377.46

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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.