Home / 21,775.60-32,668.04-12,420.08

Finding the Fourth Proportional to 21,775.60, 32,668.04 and 12,420.08

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Solution

The fourth proportional to 21,775.60, 32,668.04 and 12,420.08 is: 18,632.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.60 : 32,668.04 = 12,420.08 : x
  2. Step 2: Convert to fraction form
    21,775.60/32,668.04 = 12,420.08/x
  3. Step 3: Cross multiply
    21,775.60x = 32,668.04 × 12,420.08
  4. Step 4: Simplify right side
    21,775.60x = 405,739,670.24
  5. Step 5: Solve for x
    x = 405,739,670.24/21,775.60
  6. Step 6: Final answer
    x = 18,632.77

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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.