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Finding the Fourth Proportional to 8,920.90, 12,316.87 and 7,973.65

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Solution

The fourth proportional to 8,920.90, 12,316.87 and 7,973.65 is: 11,009.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.90 : 12,316.87 = 7,973.65 : x
  2. Step 2: Convert to fraction form
    8,920.90/12,316.87 = 7,973.65/x
  3. Step 3: Cross multiply
    8,920.90x = 12,316.87 × 7,973.65
  4. Step 4: Simplify right side
    8,920.90x = 98,210,410.48
  5. Step 5: Solve for x
    x = 98,210,410.48/8,920.90
  6. Step 6: Final answer
    x = 11,009.02

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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.