Home / 20,916.95-31,347.74-15,344.20

Finding the Fourth Proportional to 20,916.95, 31,347.74 and 15,344.20

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Solution

The fourth proportional to 20,916.95, 31,347.74 and 15,344.20 is: 22,995.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.95 : 31,347.74 = 15,344.20 : x
  2. Step 2: Convert to fraction form
    20,916.95/31,347.74 = 15,344.20/x
  3. Step 3: Cross multiply
    20,916.95x = 31,347.74 × 15,344.20
  4. Step 4: Simplify right side
    20,916.95x = 481,005,905.04
  5. Step 5: Solve for x
    x = 481,005,905.04/20,916.95
  6. Step 6: Final answer
    x = 22,995.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.