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Finding the Fourth Proportional to 21,598.65, 29,817.90 and 14,920.20

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Solution

The fourth proportional to 21,598.65, 29,817.90 and 14,920.20 is: 20,598.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,598.65 : 29,817.90 = 14,920.20 : x
  2. Step 2: Convert to fraction form
    21,598.65/29,817.90 = 14,920.20/x
  3. Step 3: Cross multiply
    21,598.65x = 29,817.90 × 14,920.20
  4. Step 4: Simplify right side
    21,598.65x = 444,889,031.58
  5. Step 5: Solve for x
    x = 444,889,031.58/21,598.65
  6. Step 6: Final answer
    x = 20,598.00

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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.