Home / 21,613.33-29,806.99-18,438.08

Finding the Fourth Proportional to 21,613.33, 29,806.99 and 18,438.08

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Solution

The fourth proportional to 21,613.33, 29,806.99 and 18,438.08 is: 25,427.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,613.33 : 29,806.99 = 18,438.08 : x
  2. Step 2: Convert to fraction form
    21,613.33/29,806.99 = 18,438.08/x
  3. Step 3: Cross multiply
    21,613.33x = 29,806.99 × 18,438.08
  4. Step 4: Simplify right side
    21,613.33x = 549,583,638.71
  5. Step 5: Solve for x
    x = 549,583,638.71/21,613.33
  6. Step 6: Final answer
    x = 25,427.99

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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.