Home / 13,390.04-18,476.48-7,421.40

Finding the Fourth Proportional to 13,390.04, 18,476.48 and 7,421.40

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Solution

The fourth proportional to 13,390.04, 18,476.48 and 7,421.40 is: 10,240.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.04 : 18,476.48 = 7,421.40 : x
  2. Step 2: Convert to fraction form
    13,390.04/18,476.48 = 7,421.40/x
  3. Step 3: Cross multiply
    13,390.04x = 18,476.48 × 7,421.40
  4. Step 4: Simplify right side
    13,390.04x = 137,121,348.67
  5. Step 5: Solve for x
    x = 137,121,348.67/13,390.04
  6. Step 6: Final answer
    x = 10,240.55

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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.