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Finding the Fourth Proportional to 8,281.90, 12,423.45 and 4,987.90

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Solution

The fourth proportional to 8,281.90, 12,423.45 and 4,987.90 is: 7,482.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,281.90 : 12,423.45 = 4,987.90 : x
  2. Step 2: Convert to fraction form
    8,281.90/12,423.45 = 4,987.90/x
  3. Step 3: Cross multiply
    8,281.90x = 12,423.45 × 4,987.90
  4. Step 4: Simplify right side
    8,281.90x = 61,966,926.26
  5. Step 5: Solve for x
    x = 61,966,926.26/8,281.90
  6. Step 6: Final answer
    x = 7,482.21

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1.5x scale

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.