Home / 15,365.71-21,160.06-13,348.20

Finding the Fourth Proportional to 15,365.71, 21,160.06 and 13,348.20

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Solution

The fourth proportional to 15,365.71, 21,160.06 and 13,348.20 is: 18,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,365.71 : 21,160.06 = 13,348.20 : x
  2. Step 2: Convert to fraction form
    15,365.71/21,160.06 = 13,348.20/x
  3. Step 3: Cross multiply
    15,365.71x = 21,160.06 × 13,348.20
  4. Step 4: Simplify right side
    15,365.71x = 282,448,712.89
  5. Step 5: Solve for x
    x = 282,448,712.89/15,365.71
  6. Step 6: Final answer
    x = 18,381.75

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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.