Home / 21,039,719.28-29,029,879.11-12,779,551.50

Finding the Fourth Proportional to 21,039,719.28, 29,029,879.11 and 12,779,551.50

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Solution

The fourth proportional to 21,039,719.28, 29,029,879.11 and 12,779,551.50 is: 17,632,784.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,039,719.28 : 29,029,879.11 = 12,779,551.50 : x
  2. Step 2: Convert to fraction form
    21,039,719.28/29,029,879.11 = 12,779,551.50/x
  3. Step 3: Cross multiply
    21,039,719.28x = 29,029,879.11 × 12,779,551.50
  4. Step 4: Simplify right side
    21,039,719.28x = 370,988,835,125,019.19
  5. Step 5: Solve for x
    x = 370,988,835,125,019.19/21,039,719.28
  6. Step 6: Final answer
    x = 17,632,784.46

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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.