Home / 20,655.81-28,509.17-12,270.69

Finding the Fourth Proportional to 20,655.81, 28,509.17 and 12,270.69

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Solution

The fourth proportional to 20,655.81, 28,509.17 and 12,270.69 is: 16,936.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.81 : 28,509.17 = 12,270.69 : x
  2. Step 2: Convert to fraction form
    20,655.81/28,509.17 = 12,270.69/x
  3. Step 3: Cross multiply
    20,655.81x = 28,509.17 × 12,270.69
  4. Step 4: Simplify right side
    20,655.81x = 349,827,125.87
  5. Step 5: Solve for x
    x = 349,827,125.87/20,655.81
  6. Step 6: Final answer
    x = 16,936.02

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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.