Home / 21,007.39-28,988.90-12,055.63

Finding the Fourth Proportional to 21,007.39, 28,988.90 and 12,055.63

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Solution

The fourth proportional to 21,007.39, 28,988.90 and 12,055.63 is: 16,636.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.39 : 28,988.90 = 12,055.63 : x
  2. Step 2: Convert to fraction form
    21,007.39/28,988.90 = 12,055.63/x
  3. Step 3: Cross multiply
    21,007.39x = 28,988.90 × 12,055.63
  4. Step 4: Simplify right side
    21,007.39x = 349,479,392.23
  5. Step 5: Solve for x
    x = 349,479,392.23/21,007.39
  6. Step 6: Final answer
    x = 16,636.02

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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.