Home / 20,953.40-28,915.65-11,393.33

Finding the Fourth Proportional to 20,953.40, 28,915.65 and 11,393.33

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Solution

The fourth proportional to 20,953.40, 28,915.65 and 11,393.33 is: 15,722.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.40 : 28,915.65 = 11,393.33 : x
  2. Step 2: Convert to fraction form
    20,953.40/28,915.65 = 11,393.33/x
  3. Step 3: Cross multiply
    20,953.40x = 28,915.65 × 11,393.33
  4. Step 4: Simplify right side
    20,953.40x = 329,445,398.04
  5. Step 5: Solve for x
    x = 329,445,398.04/20,953.40
  6. Step 6: Final answer
    x = 15,722.77

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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.