Home / 42,899.68-64,371.54-20,435.80

Finding the Fourth Proportional to 42,899.68, 64,371.54 and 20,435.80

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Solution

The fourth proportional to 42,899.68, 64,371.54 and 20,435.80 is: 30,664.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,899.68 : 64,371.54 = 20,435.80 : x
  2. Step 2: Convert to fraction form
    42,899.68/64,371.54 = 20,435.80/x
  3. Step 3: Cross multiply
    42,899.68x = 64,371.54 × 20,435.80
  4. Step 4: Simplify right side
    42,899.68x = 1,315,483,917.13
  5. Step 5: Solve for x
    x = 1,315,483,917.13/42,899.68
  6. Step 6: Final answer
    x = 30,664.19

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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.