Home / 21,916.19-30,236.95-12,478.07

Finding the Fourth Proportional to 21,916.19, 30,236.95 and 12,478.07

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Solution

The fourth proportional to 21,916.19, 30,236.95 and 12,478.07 is: 17,215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.19 : 30,236.95 = 12,478.07 : x
  2. Step 2: Convert to fraction form
    21,916.19/30,236.95 = 12,478.07/x
  3. Step 3: Cross multiply
    21,916.19x = 30,236.95 × 12,478.07
  4. Step 4: Simplify right side
    21,916.19x = 377,298,778.69
  5. Step 5: Solve for x
    x = 377,298,778.69/21,916.19
  6. Step 6: Final answer
    x = 17,215.53

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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.