Home / 15,870.19-21,900.41-8,699.73

Finding the Fourth Proportional to 15,870.19, 21,900.41 and 8,699.73

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Solution

The fourth proportional to 15,870.19, 21,900.41 and 8,699.73 is: 12,005.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.19 : 21,900.41 = 8,699.73 : x
  2. Step 2: Convert to fraction form
    15,870.19/21,900.41 = 8,699.73/x
  3. Step 3: Cross multiply
    15,870.19x = 21,900.41 × 8,699.73
  4. Step 4: Simplify right side
    15,870.19x = 190,527,728.48
  5. Step 5: Solve for x
    x = 190,527,728.48/15,870.19
  6. Step 6: Final answer
    x = 12,005.39

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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.