Home / 20,762.51-28,653.81-11,812.91

Finding the Fourth Proportional to 20,762.51, 28,653.81 and 11,812.91

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Solution

The fourth proportional to 20,762.51, 28,653.81 and 11,812.91 is: 16,302.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.51 : 28,653.81 = 11,812.91 : x
  2. Step 2: Convert to fraction form
    20,762.51/28,653.81 = 11,812.91/x
  3. Step 3: Cross multiply
    20,762.51x = 28,653.81 × 11,812.91
  4. Step 4: Simplify right side
    20,762.51x = 338,484,735.42
  5. Step 5: Solve for x
    x = 338,484,735.42/20,762.51
  6. Step 6: Final answer
    x = 16,302.69

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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.