Home / 8,428.34-12,642.45-6,581

Finding the Fourth Proportional to 8,428.34, 12,642.45 and 6,581

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Solution

The fourth proportional to 8,428.34, 12,642.45 and 6,581 is: 9,871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.34 : 12,642.45 = 6,581 : x
  2. Step 2: Convert to fraction form
    8,428.34/12,642.45 = 6,581/x
  3. Step 3: Cross multiply
    8,428.34x = 12,642.45 × 6,581
  4. Step 4: Simplify right side
    8,428.34x = 83,199,963.45
  5. Step 5: Solve for x
    x = 83,199,963.45/8,428.34
  6. Step 6: Final answer
    x = 9,871.45

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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.