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Finding the Fourth Proportional to 6,521.87, 9,000.09 and 3,870.51

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Solution

The fourth proportional to 6,521.87, 9,000.09 and 3,870.51 is: 5,341.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.87 : 9,000.09 = 3,870.51 : x
  2. Step 2: Convert to fraction form
    6,521.87/9,000.09 = 3,870.51/x
  3. Step 3: Cross multiply
    6,521.87x = 9,000.09 × 3,870.51
  4. Step 4: Simplify right side
    6,521.87x = 34,834,938.35
  5. Step 5: Solve for x
    x = 34,834,938.35/6,521.87
  6. Step 6: Final answer
    x = 5,341.25

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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.