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Finding the Fourth Proportional to 15,484.48, 21,369 and 8,411.38

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Solution

The fourth proportional to 15,484.48, 21,369 and 8,411.38 is: 11,607.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,484.48 : 21,369 = 8,411.38 : x
  2. Step 2: Convert to fraction form
    15,484.48/21,369 = 8,411.38/x
  3. Step 3: Cross multiply
    15,484.48x = 21,369 × 8,411.38
  4. Step 4: Simplify right side
    15,484.48x = 179,742,779.22
  5. Step 5: Solve for x
    x = 179,742,779.22/15,484.48
  6. Step 6: Final answer
    x = 11,607.93

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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.