Home / 21,345.16-29,452.80-11,913.70

Finding the Fourth Proportional to 21,345.16, 29,452.80 and 11,913.70

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Solution

The fourth proportional to 21,345.16, 29,452.80 and 11,913.70 is: 16,438.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.16 : 29,452.80 = 11,913.70 : x
  2. Step 2: Convert to fraction form
    21,345.16/29,452.80 = 11,913.70/x
  3. Step 3: Cross multiply
    21,345.16x = 29,452.80 × 11,913.70
  4. Step 4: Simplify right side
    21,345.16x = 350,891,823.36
  5. Step 5: Solve for x
    x = 350,891,823.36/21,345.16
  6. Step 6: Final answer
    x = 16,438.94

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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.