Home / 20,570.87-28,388.34-12,617.48

Finding the Fourth Proportional to 20,570.87, 28,388.34 and 12,617.48

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Solution

The fourth proportional to 20,570.87, 28,388.34 and 12,617.48 is: 17,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.87 : 28,388.34 = 12,617.48 : x
  2. Step 2: Convert to fraction form
    20,570.87/28,388.34 = 12,617.48/x
  3. Step 3: Cross multiply
    20,570.87x = 28,388.34 × 12,617.48
  4. Step 4: Simplify right side
    20,570.87x = 358,189,312.18
  5. Step 5: Solve for x
    x = 358,189,312.18/20,570.87
  6. Step 6: Final answer
    x = 17,412.45

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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.