Home / 42,987.96-64,494.75-20,515.52

Finding the Fourth Proportional to 42,987.96, 64,494.75 and 20,515.52

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Solution

The fourth proportional to 42,987.96, 64,494.75 and 20,515.52 is: 30,779.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,987.96 : 64,494.75 = 20,515.52 : x
  2. Step 2: Convert to fraction form
    42,987.96/64,494.75 = 20,515.52/x
  3. Step 3: Cross multiply
    42,987.96x = 64,494.75 × 20,515.52
  4. Step 4: Simplify right side
    42,987.96x = 1,323,143,011.05
  5. Step 5: Solve for x
    x = 1,323,143,011.05/42,987.96
  6. Step 6: Final answer
    x = 30,779.39

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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.