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Finding the Fourth Proportional to 39,477.90, 54,479.58 and 21,573.20

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Solution

The fourth proportional to 39,477.90, 54,479.58 and 21,573.20 is: 29,771.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,477.90 : 54,479.58 = 21,573.20 : x
  2. Step 2: Convert to fraction form
    39,477.90/54,479.58 = 21,573.20/x
  3. Step 3: Cross multiply
    39,477.90x = 54,479.58 × 21,573.20
  4. Step 4: Simplify right side
    39,477.90x = 1,175,298,602.86
  5. Step 5: Solve for x
    x = 1,175,298,602.86/39,477.90
  6. Step 6: Final answer
    x = 29,771.05

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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.