Home / 15,621.96-21,557.23-8,907.87

Finding the Fourth Proportional to 15,621.96, 21,557.23 and 8,907.87

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Solution

The fourth proportional to 15,621.96, 21,557.23 and 8,907.87 is: 12,292.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621.96 : 21,557.23 = 8,907.87 : x
  2. Step 2: Convert to fraction form
    15,621.96/21,557.23 = 8,907.87/x
  3. Step 3: Cross multiply
    15,621.96x = 21,557.23 × 8,907.87
  4. Step 4: Simplify right side
    15,621.96x = 192,028,948.51
  5. Step 5: Solve for x
    x = 192,028,948.51/15,621.96
  6. Step 6: Final answer
    x = 12,292.25

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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.