Home / 20,220.61-30,340.53-9,130.69

Finding the Fourth Proportional to 20,220.61, 30,340.53 and 9,130.69

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Solution

The fourth proportional to 20,220.61, 30,340.53 and 9,130.69 is: 13,700.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.61 : 30,340.53 = 9,130.69 : x
  2. Step 2: Convert to fraction form
    20,220.61/30,340.53 = 9,130.69/x
  3. Step 3: Cross multiply
    20,220.61x = 30,340.53 × 9,130.69
  4. Step 4: Simplify right side
    20,220.61x = 277,029,973.87
  5. Step 5: Solve for x
    x = 277,029,973.87/20,220.61
  6. Step 6: Final answer
    x = 13,700.38

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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.