Home / 14,139.40-21,209.10-12,152.20

Finding the Fourth Proportional to 14,139.40, 21,209.10 and 12,152.20

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Solution

The fourth proportional to 14,139.40, 21,209.10 and 12,152.20 is: 18,228.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.40 : 21,209.10 = 12,152.20 : x
  2. Step 2: Convert to fraction form
    14,139.40/21,209.10 = 12,152.20/x
  3. Step 3: Cross multiply
    14,139.40x = 21,209.10 × 12,152.20
  4. Step 4: Simplify right side
    14,139.40x = 257,737,225.02
  5. Step 5: Solve for x
    x = 257,737,225.02/14,139.40
  6. Step 6: Final answer
    x = 18,228.30

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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.