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Finding the Fourth Proportional to 28,358.40, 42,510.60 and 10,584.30

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Solution

The fourth proportional to 28,358.40, 42,510.60 and 10,584.30 is: 15,866.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,358.40 : 42,510.60 = 10,584.30 : x
  2. Step 2: Convert to fraction form
    28,358.40/42,510.60 = 10,584.30/x
  3. Step 3: Cross multiply
    28,358.40x = 42,510.60 × 10,584.30
  4. Step 4: Simplify right side
    28,358.40x = 449,944,943.58
  5. Step 5: Solve for x
    x = 449,944,943.58/28,358.40
  6. Step 6: Final answer
    x = 15,866.37

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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.