Home / 9,988.61-13,776.49-6,403.91

Finding the Fourth Proportional to 9,988.61, 13,776.49 and 6,403.91

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Solution

The fourth proportional to 9,988.61, 13,776.49 and 6,403.91 is: 8,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,988.61 : 13,776.49 = 6,403.91 : x
  2. Step 2: Convert to fraction form
    9,988.61/13,776.49 = 6,403.91/x
  3. Step 3: Cross multiply
    9,988.61x = 13,776.49 × 6,403.91
  4. Step 4: Simplify right side
    9,988.61x = 88,223,392.86
  5. Step 5: Solve for x
    x = 88,223,392.86/9,988.61
  6. Step 6: Final answer
    x = 8,832.40

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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.