Home / 20,120.47-27,776.24-12,570.99

Finding the Fourth Proportional to 20,120.47, 27,776.24 and 12,570.99

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Solution

The fourth proportional to 20,120.47, 27,776.24 and 12,570.99 is: 17,354.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.47 : 27,776.24 = 12,570.99 : x
  2. Step 2: Convert to fraction form
    20,120.47/27,776.24 = 12,570.99/x
  3. Step 3: Cross multiply
    20,120.47x = 27,776.24 × 12,570.99
  4. Step 4: Simplify right side
    20,120.47x = 349,174,715.40
  5. Step 5: Solve for x
    x = 349,174,715.40/20,120.47
  6. Step 6: Final answer
    x = 17,354.20

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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.