Home / 14,239.72-21,359.58-4,378.78

Finding the Fourth Proportional to 14,239.72, 21,359.58 and 4,378.78

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Solution

The fourth proportional to 14,239.72, 21,359.58 and 4,378.78 is: 6,568.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,239.72 : 21,359.58 = 4,378.78 : x
  2. Step 2: Convert to fraction form
    14,239.72/21,359.58 = 4,378.78/x
  3. Step 3: Cross multiply
    14,239.72x = 21,359.58 × 4,378.78
  4. Step 4: Simplify right side
    14,239.72x = 93,528,901.71
  5. Step 5: Solve for x
    x = 93,528,901.71/14,239.72
  6. Step 6: Final answer
    x = 6,568.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.