Home / 21,281.04-31,928.04-12,497.40

Finding the Fourth Proportional to 21,281.04, 31,928.04 and 12,497.40

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Solution

The fourth proportional to 21,281.04, 31,928.04 and 12,497.40 is: 18,749.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.04 : 31,928.04 = 12,497.40 : x
  2. Step 2: Convert to fraction form
    21,281.04/31,928.04 = 12,497.40/x
  3. Step 3: Cross multiply
    21,281.04x = 31,928.04 × 12,497.40
  4. Step 4: Simplify right side
    21,281.04x = 399,017,487.10
  5. Step 5: Solve for x
    x = 399,017,487.10/21,281.04
  6. Step 6: Final answer
    x = 18,749.91

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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.