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Finding the Fourth Proportional to 8,920.79, 12,303.76 and 6,090.45

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Solution

The fourth proportional to 8,920.79, 12,303.76 and 6,090.45 is: 8,400.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.79 : 12,303.76 = 6,090.45 : x
  2. Step 2: Convert to fraction form
    8,920.79/12,303.76 = 6,090.45/x
  3. Step 3: Cross multiply
    8,920.79x = 12,303.76 × 6,090.45
  4. Step 4: Simplify right side
    8,920.79x = 74,935,435.09
  5. Step 5: Solve for x
    x = 74,935,435.09/8,920.79
  6. Step 6: Final answer
    x = 8,400.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.