Home / 21,916.20-30,211.74-15,533.40

Finding the Fourth Proportional to 21,916.20, 30,211.74 and 15,533.40

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Solution

The fourth proportional to 21,916.20, 30,211.74 and 15,533.40 is: 21,412.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.20 : 30,211.74 = 15,533.40 : x
  2. Step 2: Convert to fraction form
    21,916.20/30,211.74 = 15,533.40/x
  3. Step 3: Cross multiply
    21,916.20x = 30,211.74 × 15,533.40
  4. Step 4: Simplify right side
    21,916.20x = 469,291,042.12
  5. Step 5: Solve for x
    x = 469,291,042.12/21,916.20
  6. Step 6: Final answer
    x = 21,412.97

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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.