Home / 20,681.77-31,011.92-10,147.18

Finding the Fourth Proportional to 20,681.77, 31,011.92 and 10,147.18

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Solution

The fourth proportional to 20,681.77, 31,011.92 and 10,147.18 is: 15,215.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.77 : 31,011.92 = 10,147.18 : x
  2. Step 2: Convert to fraction form
    20,681.77/31,011.92 = 10,147.18/x
  3. Step 3: Cross multiply
    20,681.77x = 31,011.92 × 10,147.18
  4. Step 4: Simplify right side
    20,681.77x = 314,683,328.59
  5. Step 5: Solve for x
    x = 314,683,328.59/20,681.77
  6. Step 6: Final answer
    x = 15,215.50

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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.