Home / 15,228.40-21,017.79-8,858.69

Finding the Fourth Proportional to 15,228.40, 21,017.79 and 8,858.69

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Solution

The fourth proportional to 15,228.40, 21,017.79 and 8,858.69 is: 12,226.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.40 : 21,017.79 = 8,858.69 : x
  2. Step 2: Convert to fraction form
    15,228.40/21,017.79 = 8,858.69/x
  3. Step 3: Cross multiply
    15,228.40x = 21,017.79 × 8,858.69
  4. Step 4: Simplify right side
    15,228.40x = 186,189,981.01
  5. Step 5: Solve for x
    x = 186,189,981.01/15,228.40
  6. Step 6: Final answer
    x = 12,226.50

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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.