Home / 15,864.18-21,890.07-8,790.36

Finding the Fourth Proportional to 15,864.18, 21,890.07 and 8,790.36

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Solution

The fourth proportional to 15,864.18, 21,890.07 and 8,790.36 is: 12,129.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.18 : 21,890.07 = 8,790.36 : x
  2. Step 2: Convert to fraction form
    15,864.18/21,890.07 = 8,790.36/x
  3. Step 3: Cross multiply
    15,864.18x = 21,890.07 × 8,790.36
  4. Step 4: Simplify right side
    15,864.18x = 192,421,595.73
  5. Step 5: Solve for x
    x = 192,421,595.73/15,864.18
  6. Step 6: Final answer
    x = 12,129.31

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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.