Home / 13,678.07-18,883.87-8,970.55

Finding the Fourth Proportional to 13,678.07, 18,883.87 and 8,970.55

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Solution

The fourth proportional to 13,678.07, 18,883.87 and 8,970.55 is: 12,384.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.07 : 18,883.87 = 8,970.55 : x
  2. Step 2: Convert to fraction form
    13,678.07/18,883.87 = 8,970.55/x
  3. Step 3: Cross multiply
    13,678.07x = 18,883.87 × 8,970.55
  4. Step 4: Simplify right side
    13,678.07x = 169,398,630.39
  5. Step 5: Solve for x
    x = 169,398,630.39/13,678.07
  6. Step 6: Final answer
    x = 12,384.69

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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.