Home / 28,143.68-38,838.88-15,568.96

Finding the Fourth Proportional to 28,143.68, 38,838.88 and 15,568.96

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Solution

The fourth proportional to 28,143.68, 38,838.88 and 15,568.96 is: 21,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.68 : 38,838.88 = 15,568.96 : x
  2. Step 2: Convert to fraction form
    28,143.68/38,838.88 = 15,568.96/x
  3. Step 3: Cross multiply
    28,143.68x = 38,838.88 × 15,568.96
  4. Step 4: Simplify right side
    28,143.68x = 604,680,969.16
  5. Step 5: Solve for x
    x = 604,680,969.16/28,143.68
  6. Step 6: Final answer
    x = 21,485.50

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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.