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Finding the Fourth Proportional to 35,516.40, 53,298.90 and 19,721.40

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Solution

The fourth proportional to 35,516.40, 53,298.90 and 19,721.40 is: 29,595.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,516.40 : 53,298.90 = 19,721.40 : x
  2. Step 2: Convert to fraction form
    35,516.40/53,298.90 = 19,721.40/x
  3. Step 3: Cross multiply
    35,516.40x = 53,298.90 × 19,721.40
  4. Step 4: Simplify right side
    35,516.40x = 1,051,128,926.46
  5. Step 5: Solve for x
    x = 1,051,128,926.46/35,516.40
  6. Step 6: Final answer
    x = 29,595.59

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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.