Home / 12,946.43-19,419.65-7,139.95

Finding the Fourth Proportional to 12,946.43, 19,419.65 and 7,139.95

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Solution

The fourth proportional to 12,946.43, 19,419.65 and 7,139.95 is: 10,709.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,946.43 : 19,419.65 = 7,139.95 : x
  2. Step 2: Convert to fraction form
    12,946.43/19,419.65 = 7,139.95/x
  3. Step 3: Cross multiply
    12,946.43x = 19,419.65 × 7,139.95
  4. Step 4: Simplify right side
    12,946.43x = 138,655,330.02
  5. Step 5: Solve for x
    x = 138,655,330.02/12,946.43
  6. Step 6: Final answer
    x = 10,709.93

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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.