Home / 21,135.48-31,681.62-13,754.76

Finding the Fourth Proportional to 21,135.48, 31,681.62 and 13,754.76

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Solution

The fourth proportional to 21,135.48, 31,681.62 and 13,754.76 is: 20,618.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.48 : 31,681.62 = 13,754.76 : x
  2. Step 2: Convert to fraction form
    21,135.48/31,681.62 = 13,754.76/x
  3. Step 3: Cross multiply
    21,135.48x = 31,681.62 × 13,754.76
  4. Step 4: Simplify right side
    21,135.48x = 435,773,079.51
  5. Step 5: Solve for x
    x = 435,773,079.51/21,135.48
  6. Step 6: Final answer
    x = 20,618.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.