Home / 42,172.99-58,246.55-28,720.87

Finding the Fourth Proportional to 42,172.99, 58,246.55 and 28,720.87

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Solution

The fourth proportional to 42,172.99, 58,246.55 and 28,720.87 is: 39,667.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,172.99 : 58,246.55 = 28,720.87 : x
  2. Step 2: Convert to fraction form
    42,172.99/58,246.55 = 28,720.87/x
  3. Step 3: Cross multiply
    42,172.99x = 58,246.55 × 28,720.87
  4. Step 4: Simplify right side
    42,172.99x = 1,672,891,590.50
  5. Step 5: Solve for x
    x = 1,672,891,590.50/42,172.99
  6. Step 6: Final answer
    x = 39,667.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.