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Finding the Fourth Proportional to 28,465.60, 39,264.20 and 17,287.60

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Solution

The fourth proportional to 28,465.60, 39,264.20 and 17,287.60 is: 23,845.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,465.60 : 39,264.20 = 17,287.60 : x
  2. Step 2: Convert to fraction form
    28,465.60/39,264.20 = 17,287.60/x
  3. Step 3: Cross multiply
    28,465.60x = 39,264.20 × 17,287.60
  4. Step 4: Simplify right side
    28,465.60x = 678,783,783.92
  5. Step 5: Solve for x
    x = 678,783,783.92/28,465.60
  6. Step 6: Final answer
    x = 23,845.76

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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.