Home / 15,355.20-21,187.20-9,068.64

Finding the Fourth Proportional to 15,355.20, 21,187.20 and 9,068.64

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Solution

The fourth proportional to 15,355.20, 21,187.20 and 9,068.64 is: 12,512.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.20 : 21,187.20 = 9,068.64 : x
  2. Step 2: Convert to fraction form
    15,355.20/21,187.20 = 9,068.64/x
  3. Step 3: Cross multiply
    15,355.20x = 21,187.20 × 9,068.64
  4. Step 4: Simplify right side
    15,355.20x = 192,139,089.41
  5. Step 5: Solve for x
    x = 192,139,089.41/15,355.20
  6. Step 6: Final answer
    x = 12,512.97

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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.