Home / 30,492.48-42,080.28-21,555.72

Finding the Fourth Proportional to 30,492.48, 42,080.28 and 21,555.72

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Solution

The fourth proportional to 30,492.48, 42,080.28 and 21,555.72 is: 29,747.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,492.48 : 42,080.28 = 21,555.72 : x
  2. Step 2: Convert to fraction form
    30,492.48/42,080.28 = 21,555.72/x
  3. Step 3: Cross multiply
    30,492.48x = 42,080.28 × 21,555.72
  4. Step 4: Simplify right side
    30,492.48x = 907,070,733.20
  5. Step 5: Solve for x
    x = 907,070,733.20/30,492.48
  6. Step 6: Final answer
    x = 29,747.36

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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.