Home / 21,521.40-29,697.84-12,088.20

Finding the Fourth Proportional to 21,521.40, 29,697.84 and 12,088.20

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Solution

The fourth proportional to 21,521.40, 29,697.84 and 12,088.20 is: 16,680.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,521.40 : 29,697.84 = 12,088.20 : x
  2. Step 2: Convert to fraction form
    21,521.40/29,697.84 = 12,088.20/x
  3. Step 3: Cross multiply
    21,521.40x = 29,697.84 × 12,088.20
  4. Step 4: Simplify right side
    21,521.40x = 358,993,429.49
  5. Step 5: Solve for x
    x = 358,993,429.49/21,521.40
  6. Step 6: Final answer
    x = 16,680.77

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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.