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Finding the Fourth Proportional to 9,990.40, 14,973.60 and 6,870.40

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Solution

The fourth proportional to 9,990.40, 14,973.60 and 6,870.40 is: 10,297.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.40 : 14,973.60 = 6,870.40 : x
  2. Step 2: Convert to fraction form
    9,990.40/14,973.60 = 6,870.40/x
  3. Step 3: Cross multiply
    9,990.40x = 14,973.60 × 6,870.40
  4. Step 4: Simplify right side
    9,990.40x = 102,874,621.44
  5. Step 5: Solve for x
    x = 102,874,621.44/9,990.40
  6. Step 6: Final answer
    x = 10,297.35

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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.