Home / 13,389.93-18,478.25-7,421.71

Finding the Fourth Proportional to 13,389.93, 18,478.25 and 7,421.71

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Solution

The fourth proportional to 13,389.93, 18,478.25 and 7,421.71 is: 10,242.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.93 : 18,478.25 = 7,421.71 : x
  2. Step 2: Convert to fraction form
    13,389.93/18,478.25 = 7,421.71/x
  3. Step 3: Cross multiply
    13,389.93x = 18,478.25 × 7,421.71
  4. Step 4: Simplify right side
    13,389.93x = 137,140,212.81
  5. Step 5: Solve for x
    x = 137,140,212.81/13,389.93
  6. Step 6: Final answer
    x = 10,242.04

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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.