Home / 21,731.61-29,988.58-13,346.49

Finding the Fourth Proportional to 21,731.61, 29,988.58 and 13,346.49

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Solution

The fourth proportional to 21,731.61, 29,988.58 and 13,346.49 is: 18,417.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.61 : 29,988.58 = 13,346.49 : x
  2. Step 2: Convert to fraction form
    21,731.61/29,988.58 = 13,346.49/x
  3. Step 3: Cross multiply
    21,731.61x = 29,988.58 × 13,346.49
  4. Step 4: Simplify right side
    21,731.61x = 400,242,283.08
  5. Step 5: Solve for x
    x = 400,242,283.08/21,731.61
  6. Step 6: Final answer
    x = 18,417.52

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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.