Home / 21,916.25-30,237.04-12,478.13

Finding the Fourth Proportional to 21,916.25, 30,237.04 and 12,478.13

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Solution

The fourth proportional to 21,916.25, 30,237.04 and 12,478.13 is: 17,215.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.25 : 30,237.04 = 12,478.13 : x
  2. Step 2: Convert to fraction form
    21,916.25/30,237.04 = 12,478.13/x
  3. Step 3: Cross multiply
    21,916.25x = 30,237.04 × 12,478.13
  4. Step 4: Simplify right side
    21,916.25x = 377,301,807.13
  5. Step 5: Solve for x
    x = 377,301,807.13/21,916.25
  6. Step 6: Final answer
    x = 17,215.62

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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.