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Finding the Fourth Proportional to 38,880.74, 53,657.16 and 21,890.82

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Solution

The fourth proportional to 38,880.74, 53,657.16 and 21,890.82 is: 30,210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,880.74 : 53,657.16 = 21,890.82 : x
  2. Step 2: Convert to fraction form
    38,880.74/53,657.16 = 21,890.82/x
  3. Step 3: Cross multiply
    38,880.74x = 53,657.16 × 21,890.82
  4. Step 4: Simplify right side
    38,880.74x = 1,174,599,231.27
  5. Step 5: Solve for x
    x = 1,174,599,231.27/38,880.74
  6. Step 6: Final answer
    x = 30,210.31

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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.