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Finding the Fourth Proportional to 21,873.80, 32,810.70 and 8,719.40

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Solution

The fourth proportional to 21,873.80, 32,810.70 and 8,719.40 is: 13,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.80 : 32,810.70 = 8,719.40 : x
  2. Step 2: Convert to fraction form
    21,873.80/32,810.70 = 8,719.40/x
  3. Step 3: Cross multiply
    21,873.80x = 32,810.70 × 8,719.40
  4. Step 4: Simplify right side
    21,873.80x = 286,089,617.58
  5. Step 5: Solve for x
    x = 286,089,617.58/21,873.80
  6. Step 6: Final answer
    x = 13,079.10

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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.