Home / 13,328.13-20,005.16-6,407.49

Finding the Fourth Proportional to 13,328.13, 20,005.16 and 6,407.49

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Solution

The fourth proportional to 13,328.13, 20,005.16 and 6,407.49 is: 9,617.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.13 : 20,005.16 = 6,407.49 : x
  2. Step 2: Convert to fraction form
    13,328.13/20,005.16 = 6,407.49/x
  3. Step 3: Cross multiply
    13,328.13x = 20,005.16 × 6,407.49
  4. Step 4: Simplify right side
    13,328.13x = 128,182,830.61
  5. Step 5: Solve for x
    x = 128,182,830.61/13,328.13
  6. Step 6: Final answer
    x = 9,617.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.