Home / 21,869.88-30,184.70-12,916.95

Finding the Fourth Proportional to 21,869.88, 30,184.70 and 12,916.95

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Solution

The fourth proportional to 21,869.88, 30,184.70 and 12,916.95 is: 17,827.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,869.88 : 30,184.70 = 12,916.95 : x
  2. Step 2: Convert to fraction form
    21,869.88/30,184.70 = 12,916.95/x
  3. Step 3: Cross multiply
    21,869.88x = 30,184.70 × 12,916.95
  4. Step 4: Simplify right side
    21,869.88x = 389,894,196.08
  5. Step 5: Solve for x
    x = 389,894,196.08/21,869.88
  6. Step 6: Final answer
    x = 17,827.91

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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.