Home / 20,368.21-28,108.47-11,417.71

Finding the Fourth Proportional to 20,368.21, 28,108.47 and 11,417.71

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Solution

The fourth proportional to 20,368.21, 28,108.47 and 11,417.71 is: 15,756.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,368.21 : 28,108.47 = 11,417.71 : x
  2. Step 2: Convert to fraction form
    20,368.21/28,108.47 = 11,417.71/x
  3. Step 3: Cross multiply
    20,368.21x = 28,108.47 × 11,417.71
  4. Step 4: Simplify right side
    20,368.21x = 320,934,359.00
  5. Step 5: Solve for x
    x = 320,934,359.00/20,368.21
  6. Step 6: Final answer
    x = 15,756.63

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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.