Home / 13,718.49-18,931.50-7,430.87

Finding the Fourth Proportional to 13,718.49, 18,931.50 and 7,430.87

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Solution

The fourth proportional to 13,718.49, 18,931.50 and 7,430.87 is: 10,254.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,718.49 : 18,931.50 = 7,430.87 : x
  2. Step 2: Convert to fraction form
    13,718.49/18,931.50 = 7,430.87/x
  3. Step 3: Cross multiply
    13,718.49x = 18,931.50 × 7,430.87
  4. Step 4: Simplify right side
    13,718.49x = 140,677,420.75
  5. Step 5: Solve for x
    x = 140,677,420.75/13,718.49
  6. Step 6: Final answer
    x = 10,254.58

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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.