Home / 19,685.48-27,158.64-12,615.80

Finding the Fourth Proportional to 19,685.48, 27,158.64 and 12,615.80

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Solution

The fourth proportional to 19,685.48, 27,158.64 and 12,615.80 is: 17,405.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.48 : 27,158.64 = 12,615.80 : x
  2. Step 2: Convert to fraction form
    19,685.48/27,158.64 = 12,615.80/x
  3. Step 3: Cross multiply
    19,685.48x = 27,158.64 × 12,615.80
  4. Step 4: Simplify right side
    19,685.48x = 342,627,970.51
  5. Step 5: Solve for x
    x = 342,627,970.51/19,685.48
  6. Step 6: Final answer
    x = 17,405.11

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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.