Home / 20,822.74-31,172.75-13,405.16

Finding the Fourth Proportional to 20,822.74, 31,172.75 and 13,405.16

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Solution

The fourth proportional to 20,822.74, 31,172.75 and 13,405.16 is: 20,068.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.74 : 31,172.75 = 13,405.16 : x
  2. Step 2: Convert to fraction form
    20,822.74/31,172.75 = 13,405.16/x
  3. Step 3: Cross multiply
    20,822.74x = 31,172.75 × 13,405.16
  4. Step 4: Simplify right side
    20,822.74x = 417,875,762.57
  5. Step 5: Solve for x
    x = 417,875,762.57/20,822.74
  6. Step 6: Final answer
    x = 20,068.24

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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.