Home / 20,318.72-28,038.52-11,364.68

Finding the Fourth Proportional to 20,318.72, 28,038.52 and 11,364.68

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Solution

The fourth proportional to 20,318.72, 28,038.52 and 11,364.68 is: 15,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.72 : 28,038.52 = 11,364.68 : x
  2. Step 2: Convert to fraction form
    20,318.72/28,038.52 = 11,364.68/x
  3. Step 3: Cross multiply
    20,318.72x = 28,038.52 × 11,364.68
  4. Step 4: Simplify right side
    20,318.72x = 318,648,807.47
  5. Step 5: Solve for x
    x = 318,648,807.47/20,318.72
  6. Step 6: Final answer
    x = 15,682.52

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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.