Home / 21,360.87-29,478.40-11,801.25

Finding the Fourth Proportional to 21,360.87, 29,478.40 and 11,801.25

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Solution

The fourth proportional to 21,360.87, 29,478.40 and 11,801.25 is: 16,285.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,360.87 : 29,478.40 = 11,801.25 : x
  2. Step 2: Convert to fraction form
    21,360.87/29,478.40 = 11,801.25/x
  3. Step 3: Cross multiply
    21,360.87x = 29,478.40 × 11,801.25
  4. Step 4: Simplify right side
    21,360.87x = 347,881,938.50
  5. Step 5: Solve for x
    x = 347,881,938.50/21,360.87
  6. Step 6: Final answer
    x = 16,285.94

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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.