Home / 21,405,931.50-29,539,866.03-12,586,379.34

Finding the Fourth Proportional to 21,405,931.50, 29,539,866.03 and 12,586,379.34

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Solution

The fourth proportional to 21,405,931.50, 29,539,866.03 and 12,586,379.34 is: 17,369,015.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405,931.50 : 29,539,866.03 = 12,586,379.34 : x
  2. Step 2: Convert to fraction form
    21,405,931.50/29,539,866.03 = 12,586,379.34/x
  3. Step 3: Cross multiply
    21,405,931.50x = 29,539,866.03 × 12,586,379.34
  4. Step 4: Simplify right side
    21,405,931.50x = 371,799,959,506,359.81
  5. Step 5: Solve for x
    x = 371,799,959,506,359.81/21,405,931.50
  6. Step 6: Final answer
    x = 17,369,015.66

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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.