Home / 21,381.42-29,508.64-12,433.08

Finding the Fourth Proportional to 21,381.42, 29,508.64 and 12,433.08

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Solution

The fourth proportional to 21,381.42, 29,508.64 and 12,433.08 is: 17,158.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.42 : 29,508.64 = 12,433.08 : x
  2. Step 2: Convert to fraction form
    21,381.42/29,508.64 = 12,433.08/x
  3. Step 3: Cross multiply
    21,381.42x = 29,508.64 × 12,433.08
  4. Step 4: Simplify right side
    21,381.42x = 366,883,281.81
  5. Step 5: Solve for x
    x = 366,883,281.81/21,381.42
  6. Step 6: Final answer
    x = 17,158.98

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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.