Home / 42,912.10-64,308.90-30,970.68

Finding the Fourth Proportional to 42,912.10, 64,308.90 and 30,970.68

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Solution

The fourth proportional to 42,912.10, 64,308.90 and 30,970.68 is: 46,413.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,912.10 : 64,308.90 = 30,970.68 : x
  2. Step 2: Convert to fraction form
    42,912.10/64,308.90 = 30,970.68/x
  3. Step 3: Cross multiply
    42,912.10x = 64,308.90 × 30,970.68
  4. Step 4: Simplify right side
    42,912.10x = 1,991,690,363.05
  5. Step 5: Solve for x
    x = 1,991,690,363.05/42,912.10
  6. Step 6: Final answer
    x = 46,413.26

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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.