Home / 20,955.36-31,428.18-9,869.70

Finding the Fourth Proportional to 20,955.36, 31,428.18 and 9,869.70

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Solution

The fourth proportional to 20,955.36, 31,428.18 and 9,869.70 is: 14,802.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.36 : 31,428.18 = 9,869.70 : x
  2. Step 2: Convert to fraction form
    20,955.36/31,428.18 = 9,869.70/x
  3. Step 3: Cross multiply
    20,955.36x = 31,428.18 × 9,869.70
  4. Step 4: Simplify right side
    20,955.36x = 310,186,708.15
  5. Step 5: Solve for x
    x = 310,186,708.15/20,955.36
  6. Step 6: Final answer
    x = 14,802.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.