Home / 21,810.60-32,720.55-12,455.10

Finding the Fourth Proportional to 21,810.60, 32,720.55 and 12,455.10

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Solution

The fourth proportional to 21,810.60, 32,720.55 and 12,455.10 is: 18,685.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.60 : 32,720.55 = 12,455.10 : x
  2. Step 2: Convert to fraction form
    21,810.60/32,720.55 = 12,455.10/x
  3. Step 3: Cross multiply
    21,810.60x = 32,720.55 × 12,455.10
  4. Step 4: Simplify right side
    21,810.60x = 407,537,722.31
  5. Step 5: Solve for x
    x = 407,537,722.31/21,810.60
  6. Step 6: Final answer
    x = 18,685.31

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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.