Home / 28,384.92-39,172.98-15,809.64

Finding the Fourth Proportional to 28,384.92, 39,172.98 and 15,809.64

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Solution

The fourth proportional to 28,384.92, 39,172.98 and 15,809.64 is: 21,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.92 : 39,172.98 = 15,809.64 : x
  2. Step 2: Convert to fraction form
    28,384.92/39,172.98 = 15,809.64/x
  3. Step 3: Cross multiply
    28,384.92x = 39,172.98 × 15,809.64
  4. Step 4: Simplify right side
    28,384.92x = 619,310,711.53
  5. Step 5: Solve for x
    x = 619,310,711.53/28,384.92
  6. Step 6: Final answer
    x = 21,818.30

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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.