Home / 21,613.83-29,807.68-18,438.58

Finding the Fourth Proportional to 21,613.83, 29,807.68 and 18,438.58

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Solution

The fourth proportional to 21,613.83, 29,807.68 and 18,438.58 is: 25,428.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.83 : 29,807.68 = 18,438.58 : x
  2. Step 2: Convert to fraction form
    21,613.83/29,807.68 = 18,438.58/x
  3. Step 3: Cross multiply
    21,613.83x = 29,807.68 × 18,438.58
  4. Step 4: Simplify right side
    21,613.83x = 549,611,200.10
  5. Step 5: Solve for x
    x = 549,611,200.10/21,613.83
  6. Step 6: Final answer
    x = 25,428.68

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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.