Home / 20,880.31-31,312.70-9,035.81

Finding the Fourth Proportional to 20,880.31, 31,312.70 and 9,035.81

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Solution

The fourth proportional to 20,880.31, 31,312.70 and 9,035.81 is: 13,550.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.31 : 31,312.70 = 9,035.81 : x
  2. Step 2: Convert to fraction form
    20,880.31/31,312.70 = 9,035.81/x
  3. Step 3: Cross multiply
    20,880.31x = 31,312.70 × 9,035.81
  4. Step 4: Simplify right side
    20,880.31x = 282,935,428.63
  5. Step 5: Solve for x
    x = 282,935,428.63/20,880.31
  6. Step 6: Final answer
    x = 13,550.34

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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.