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Finding the Fourth Proportional to 38,880.61, 53,656.95 and 21,885.95

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Solution

The fourth proportional to 38,880.61, 53,656.95 and 21,885.95 is: 30,203.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,880.61 : 53,656.95 = 21,885.95 : x
  2. Step 2: Convert to fraction form
    38,880.61/53,656.95 = 21,885.95/x
  3. Step 3: Cross multiply
    38,880.61x = 53,656.95 × 21,885.95
  4. Step 4: Simplify right side
    38,880.61x = 1,174,333,324.85
  5. Step 5: Solve for x
    x = 1,174,333,324.85/38,880.61
  6. Step 6: Final answer
    x = 30,203.57

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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.