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Finding the Fourth Proportional to 18,970.55, 28,457.21 and 7,283.77

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Solution

The fourth proportional to 18,970.55, 28,457.21 and 7,283.77 is: 10,926.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.55 : 28,457.21 = 7,283.77 : x
  2. Step 2: Convert to fraction form
    18,970.55/28,457.21 = 7,283.77/x
  3. Step 3: Cross multiply
    18,970.55x = 28,457.21 × 7,283.77
  4. Step 4: Simplify right side
    18,970.55x = 207,275,772.48
  5. Step 5: Solve for x
    x = 207,275,772.48/18,970.55
  6. Step 6: Final answer
    x = 10,926.19

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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.