Home / 15,870.55-21,902.66-8,799.07

Finding the Fourth Proportional to 15,870.55, 21,902.66 and 8,799.07

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Solution

The fourth proportional to 15,870.55, 21,902.66 and 8,799.07 is: 12,143.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.55 : 21,902.66 = 8,799.07 : x
  2. Step 2: Convert to fraction form
    15,870.55/21,902.66 = 8,799.07/x
  3. Step 3: Cross multiply
    15,870.55x = 21,902.66 × 8,799.07
  4. Step 4: Simplify right side
    15,870.55x = 192,723,038.53
  5. Step 5: Solve for x
    x = 192,723,038.53/15,870.55
  6. Step 6: Final answer
    x = 12,143.44

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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.