Home / 13,685.84-18,886.47-7,398.21

Finding the Fourth Proportional to 13,685.84, 18,886.47 and 7,398.21

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Solution

The fourth proportional to 13,685.84, 18,886.47 and 7,398.21 is: 10,209.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.84 : 18,886.47 = 7,398.21 : x
  2. Step 2: Convert to fraction form
    13,685.84/18,886.47 = 7,398.21/x
  3. Step 3: Cross multiply
    13,685.84x = 18,886.47 × 7,398.21
  4. Step 4: Simplify right side
    13,685.84x = 139,726,061.18
  5. Step 5: Solve for x
    x = 139,726,061.18/13,685.84
  6. Step 6: Final answer
    x = 10,209.54

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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.