Home / 14,685.09-20,265.57-7,970.78

Finding the Fourth Proportional to 14,685.09, 20,265.57 and 7,970.78

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Solution

The fourth proportional to 14,685.09, 20,265.57 and 7,970.78 is: 10,999.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.09 : 20,265.57 = 7,970.78 : x
  2. Step 2: Convert to fraction form
    14,685.09/20,265.57 = 7,970.78/x
  3. Step 3: Cross multiply
    14,685.09x = 20,265.57 × 7,970.78
  4. Step 4: Simplify right side
    14,685.09x = 161,532,298.72
  5. Step 5: Solve for x
    x = 161,532,298.72/14,685.09
  6. Step 6: Final answer
    x = 10,999.75

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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.