Home / 21,459.81-29,613.70-11,900.08

Finding the Fourth Proportional to 21,459.81, 29,613.70 and 11,900.08

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Solution

The fourth proportional to 21,459.81, 29,613.70 and 11,900.08 is: 16,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,459.81 : 29,613.70 = 11,900.08 : x
  2. Step 2: Convert to fraction form
    21,459.81/29,613.70 = 11,900.08/x
  3. Step 3: Cross multiply
    21,459.81x = 29,613.70 × 11,900.08
  4. Step 4: Simplify right side
    21,459.81x = 352,405,399.10
  5. Step 5: Solve for x
    x = 352,405,399.10/21,459.81
  6. Step 6: Final answer
    x = 16,421.65

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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.