Home / 20,867.84-28,798.34-11,436.32

Finding the Fourth Proportional to 20,867.84, 28,798.34 and 11,436.32

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Solution

The fourth proportional to 20,867.84, 28,798.34 and 11,436.32 is: 15,782.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.84 : 28,798.34 = 11,436.32 : x
  2. Step 2: Convert to fraction form
    20,867.84/28,798.34 = 11,436.32/x
  3. Step 3: Cross multiply
    20,867.84x = 28,798.34 × 11,436.32
  4. Step 4: Simplify right side
    20,867.84x = 329,347,031.71
  5. Step 5: Solve for x
    x = 329,347,031.71/20,867.84
  6. Step 6: Final answer
    x = 15,782.52

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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.