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Finding the Fourth Proportional to 9,918.80, 14,870.91 and 4,728.32

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Solution

The fourth proportional to 9,918.80, 14,870.91 and 4,728.32 is: 7,089.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.80 : 14,870.91 = 4,728.32 : x
  2. Step 2: Convert to fraction form
    9,918.80/14,870.91 = 4,728.32/x
  3. Step 3: Cross multiply
    9,918.80x = 14,870.91 × 4,728.32
  4. Step 4: Simplify right side
    9,918.80x = 70,314,470.17
  5. Step 5: Solve for x
    x = 70,314,470.17/9,918.80
  6. Step 6: Final answer
    x = 7,089.01

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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.