Home / 20,870.63-28,801.46-11,438.99

Finding the Fourth Proportional to 20,870.63, 28,801.46 and 11,438.99

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Solution

The fourth proportional to 20,870.63, 28,801.46 and 11,438.99 is: 15,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.63 : 28,801.46 = 11,438.99 : x
  2. Step 2: Convert to fraction form
    20,870.63/28,801.46 = 11,438.99/x
  3. Step 3: Cross multiply
    20,870.63x = 28,801.46 × 11,438.99
  4. Step 4: Simplify right side
    20,870.63x = 329,459,497.52
  5. Step 5: Solve for x
    x = 329,459,497.52/20,870.63
  6. Step 6: Final answer
    x = 15,785.80

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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.