Home / 15,428.77-21,333.65-15,178.48

Finding the Fourth Proportional to 15,428.77, 21,333.65 and 15,178.48

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Solution

The fourth proportional to 15,428.77, 21,333.65 and 15,178.48 is: 20,987.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.77 : 21,333.65 = 15,178.48 : x
  2. Step 2: Convert to fraction form
    15,428.77/21,333.65 = 15,178.48/x
  3. Step 3: Cross multiply
    15,428.77x = 21,333.65 × 15,178.48
  4. Step 4: Simplify right side
    15,428.77x = 323,812,250.63
  5. Step 5: Solve for x
    x = 323,812,250.63/15,428.77
  6. Step 6: Final answer
    x = 20,987.56

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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.