Home / 13,637.61-20,475.57-6,978.87

Finding the Fourth Proportional to 13,637.61, 20,475.57 and 6,978.87

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Solution

The fourth proportional to 13,637.61, 20,475.57 and 6,978.87 is: 10,478.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,637.61 : 20,475.57 = 6,978.87 : x
  2. Step 2: Convert to fraction form
    13,637.61/20,475.57 = 6,978.87/x
  3. Step 3: Cross multiply
    13,637.61x = 20,475.57 × 6,978.87
  4. Step 4: Simplify right side
    13,637.61x = 142,896,341.21
  5. Step 5: Solve for x
    x = 142,896,341.21/13,637.61
  6. Step 6: Final answer
    x = 10,478.11

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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.