Home / 28,478.73-42,727.23-13,688.73

Finding the Fourth Proportional to 28,478.73, 42,727.23 and 13,688.73

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Solution

The fourth proportional to 28,478.73, 42,727.23 and 13,688.73 is: 20,537.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.73 : 42,727.23 = 13,688.73 : x
  2. Step 2: Convert to fraction form
    28,478.73/42,727.23 = 13,688.73/x
  3. Step 3: Cross multiply
    28,478.73x = 42,727.23 × 13,688.73
  4. Step 4: Simplify right side
    28,478.73x = 584,881,515.12
  5. Step 5: Solve for x
    x = 584,881,515.12/28,478.73
  6. Step 6: Final answer
    x = 20,537.49

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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.