Home / 21,953.08-30,295.30-12,521.40

Finding the Fourth Proportional to 21,953.08, 30,295.30 and 12,521.40

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Solution

The fourth proportional to 21,953.08, 30,295.30 and 12,521.40 is: 17,279.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,953.08 : 30,295.30 = 12,521.40 : x
  2. Step 2: Convert to fraction form
    21,953.08/30,295.30 = 12,521.40/x
  3. Step 3: Cross multiply
    21,953.08x = 30,295.30 × 12,521.40
  4. Step 4: Simplify right side
    21,953.08x = 379,339,569.42
  5. Step 5: Solve for x
    x = 379,339,569.42/21,953.08
  6. Step 6: Final answer
    x = 17,279.56

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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.