Home / 21,913.50-30,240.63-12,487.53

Finding the Fourth Proportional to 21,913.50, 30,240.63 and 12,487.53

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Solution

The fourth proportional to 21,913.50, 30,240.63 and 12,487.53 is: 17,232.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.50 : 30,240.63 = 12,487.53 : x
  2. Step 2: Convert to fraction form
    21,913.50/30,240.63 = 12,487.53/x
  3. Step 3: Cross multiply
    21,913.50x = 30,240.63 × 12,487.53
  4. Step 4: Simplify right side
    21,913.50x = 377,630,774.34
  5. Step 5: Solve for x
    x = 377,630,774.34/21,913.50
  6. Step 6: Final answer
    x = 17,232.79

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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.