Home / 21,271.60-31,908.18-10,871.20

Finding the Fourth Proportional to 21,271.60, 31,908.18 and 10,871.20

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Solution

The fourth proportional to 21,271.60, 31,908.18 and 10,871.20 is: 16,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.60 : 31,908.18 = 10,871.20 : x
  2. Step 2: Convert to fraction form
    21,271.60/31,908.18 = 10,871.20/x
  3. Step 3: Cross multiply
    21,271.60x = 31,908.18 × 10,871.20
  4. Step 4: Simplify right side
    21,271.60x = 346,880,206.42
  5. Step 5: Solve for x
    x = 346,880,206.42/21,271.60
  6. Step 6: Final answer
    x = 16,307.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.