Home / 20,384.07-28,118.07-12,818.40

Finding the Fourth Proportional to 20,384.07, 28,118.07 and 12,818.40

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Solution

The fourth proportional to 20,384.07, 28,118.07 and 12,818.40 is: 17,681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.07 : 28,118.07 = 12,818.40 : x
  2. Step 2: Convert to fraction form
    20,384.07/28,118.07 = 12,818.40/x
  3. Step 3: Cross multiply
    20,384.07x = 28,118.07 × 12,818.40
  4. Step 4: Simplify right side
    20,384.07x = 360,428,668.49
  5. Step 5: Solve for x
    x = 360,428,668.49/20,384.07
  6. Step 6: Final answer
    x = 17,681.88

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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.