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Finding the Fourth Proportional to 21,873.60, 32,810.40 and 19,686.60

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Solution

The fourth proportional to 21,873.60, 32,810.40 and 19,686.60 is: 29,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.60 : 32,810.40 = 19,686.60 : x
  2. Step 2: Convert to fraction form
    21,873.60/32,810.40 = 19,686.60/x
  3. Step 3: Cross multiply
    21,873.60x = 32,810.40 × 19,686.60
  4. Step 4: Simplify right side
    21,873.60x = 645,925,220.64
  5. Step 5: Solve for x
    x = 645,925,220.64/21,873.60
  6. Step 6: Final answer
    x = 29,529.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.