Home / 20,397.69-28,140.75-12,426.08

Finding the Fourth Proportional to 20,397.69, 28,140.75 and 12,426.08

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Solution

The fourth proportional to 20,397.69, 28,140.75 and 12,426.08 is: 17,143.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,397.69 : 28,140.75 = 12,426.08 : x
  2. Step 2: Convert to fraction form
    20,397.69/28,140.75 = 12,426.08/x
  3. Step 3: Cross multiply
    20,397.69x = 28,140.75 × 12,426.08
  4. Step 4: Simplify right side
    20,397.69x = 349,679,070.06
  5. Step 5: Solve for x
    x = 349,679,070.06/20,397.69
  6. Step 6: Final answer
    x = 17,143.07

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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.