Home / 13,688.37-18,889.95-7,400.74

Finding the Fourth Proportional to 13,688.37, 18,889.95 and 7,400.74

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Solution

The fourth proportional to 13,688.37, 18,889.95 and 7,400.74 is: 10,213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.37 : 18,889.95 = 7,400.74 : x
  2. Step 2: Convert to fraction form
    13,688.37/18,889.95 = 7,400.74/x
  3. Step 3: Cross multiply
    13,688.37x = 18,889.95 × 7,400.74
  4. Step 4: Simplify right side
    13,688.37x = 139,799,625.60
  5. Step 5: Solve for x
    x = 139,799,625.60/13,688.37
  6. Step 6: Final answer
    x = 10,213.02

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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.