Home / 14,139.90-21,209.85-12,930.30

Finding the Fourth Proportional to 14,139.90, 21,209.85 and 12,930.30

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Solution

The fourth proportional to 14,139.90, 21,209.85 and 12,930.30 is: 19,395.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.90 : 21,209.85 = 12,930.30 : x
  2. Step 2: Convert to fraction form
    14,139.90/21,209.85 = 12,930.30/x
  3. Step 3: Cross multiply
    14,139.90x = 21,209.85 × 12,930.30
  4. Step 4: Simplify right side
    14,139.90x = 274,249,723.46
  5. Step 5: Solve for x
    x = 274,249,723.46/14,139.90
  6. Step 6: Final answer
    x = 19,395.45

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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.