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Finding the Fourth Proportional to 8,970.93, 12,390.48 and 7,184.61

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Solution

The fourth proportional to 8,970.93, 12,390.48 and 7,184.61 is: 9,923.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.93 : 12,390.48 = 7,184.61 : x
  2. Step 2: Convert to fraction form
    8,970.93/12,390.48 = 7,184.61/x
  3. Step 3: Cross multiply
    8,970.93x = 12,390.48 × 7,184.61
  4. Step 4: Simplify right side
    8,970.93x = 89,020,766.51
  5. Step 5: Solve for x
    x = 89,020,766.51/8,970.93
  6. Step 6: Final answer
    x = 9,923.25

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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.