Home / 21,280.42-31,925.69-6,488.40

Finding the Fourth Proportional to 21,280.42, 31,925.69 and 6,488.40

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Solution

The fourth proportional to 21,280.42, 31,925.69 and 6,488.40 is: 9,734.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.42 : 31,925.69 = 6,488.40 : x
  2. Step 2: Convert to fraction form
    21,280.42/31,925.69 = 6,488.40/x
  3. Step 3: Cross multiply
    21,280.42x = 31,925.69 × 6,488.40
  4. Step 4: Simplify right side
    21,280.42x = 207,146,795.10
  5. Step 5: Solve for x
    x = 207,146,795.10/21,280.42
  6. Step 6: Final answer
    x = 9,734.15

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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.