Home / 20,641.24-28,484.69-11,688.72

Finding the Fourth Proportional to 20,641.24, 28,484.69 and 11,688.72

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Solution

The fourth proportional to 20,641.24, 28,484.69 and 11,688.72 is: 16,130.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.24 : 28,484.69 = 11,688.72 : x
  2. Step 2: Convert to fraction form
    20,641.24/28,484.69 = 11,688.72/x
  3. Step 3: Cross multiply
    20,641.24x = 28,484.69 × 11,688.72
  4. Step 4: Simplify right side
    20,641.24x = 332,949,565.70
  5. Step 5: Solve for x
    x = 332,949,565.70/20,641.24
  6. Step 6: Final answer
    x = 16,130.31

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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.