Home / 20,710.13-28,580.81-12,331.49

Finding the Fourth Proportional to 20,710.13, 28,580.81 and 12,331.49

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Solution

The fourth proportional to 20,710.13, 28,580.81 and 12,331.49 is: 17,017.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.13 : 28,580.81 = 12,331.49 : x
  2. Step 2: Convert to fraction form
    20,710.13/28,580.81 = 12,331.49/x
  3. Step 3: Cross multiply
    20,710.13x = 28,580.81 × 12,331.49
  4. Step 4: Simplify right side
    20,710.13x = 352,443,768.15
  5. Step 5: Solve for x
    x = 352,443,768.15/20,710.13
  6. Step 6: Final answer
    x = 17,017.94

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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.