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Finding the Fourth Proportional to 12,988.10, 17,923.77 and 7,398.98

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Solution

The fourth proportional to 12,988.10, 17,923.77 and 7,398.98 is: 10,210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.10 : 17,923.77 = 7,398.98 : x
  2. Step 2: Convert to fraction form
    12,988.10/17,923.77 = 7,398.98/x
  3. Step 3: Cross multiply
    12,988.10x = 17,923.77 × 7,398.98
  4. Step 4: Simplify right side
    12,988.10x = 132,617,615.75
  5. Step 5: Solve for x
    x = 132,617,615.75/12,988.10
  6. Step 6: Final answer
    x = 10,210.70

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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.