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Finding the Fourth Proportional to 18,693.37, 28,038.95 and 7,005.61

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Solution

The fourth proportional to 18,693.37, 28,038.95 and 7,005.61 is: 10,508.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.37 : 28,038.95 = 7,005.61 : x
  2. Step 2: Convert to fraction form
    18,693.37/28,038.95 = 7,005.61/x
  3. Step 3: Cross multiply
    18,693.37x = 28,038.95 × 7,005.61
  4. Step 4: Simplify right side
    18,693.37x = 196,429,790.80
  5. Step 5: Solve for x
    x = 196,429,790.80/18,693.37
  6. Step 6: Final answer
    x = 10,508.00

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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.