Home / 20,976.40-28,946.58-11,545

Finding the Fourth Proportional to 20,976.40, 28,946.58 and 11,545

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Solution

The fourth proportional to 20,976.40, 28,946.58 and 11,545 is: 15,931.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.40 : 28,946.58 = 11,545 : x
  2. Step 2: Convert to fraction form
    20,976.40/28,946.58 = 11,545/x
  3. Step 3: Cross multiply
    20,976.40x = 28,946.58 × 11,545
  4. Step 4: Simplify right side
    20,976.40x = 334,188,266.10
  5. Step 5: Solve for x
    x = 334,188,266.10/20,976.40
  6. Step 6: Final answer
    x = 15,931.63

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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.