Home / 28,015.04-38,660.72-15,440

Finding the Fourth Proportional to 28,015.04, 38,660.72 and 15,440

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Solution

The fourth proportional to 28,015.04, 38,660.72 and 15,440 is: 21,307.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.04 : 38,660.72 = 15,440 : x
  2. Step 2: Convert to fraction form
    28,015.04/38,660.72 = 15,440/x
  3. Step 3: Cross multiply
    28,015.04x = 38,660.72 × 15,440
  4. Step 4: Simplify right side
    28,015.04x = 596,921,516.80
  5. Step 5: Solve for x
    x = 596,921,516.80/28,015.04
  6. Step 6: Final answer
    x = 21,307.18

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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.