Home / 20,789,009.70-31,136,275.35-13,136,259.30

Finding the Fourth Proportional to 20,789,009.70, 31,136,275.35 and 13,136,259.30

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Solution

The fourth proportional to 20,789,009.70, 31,136,275.35 and 13,136,259.30 is: 19,674,539.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789,009.70 : 31,136,275.35 = 13,136,259.30 : x
  2. Step 2: Convert to fraction form
    20,789,009.70/31,136,275.35 = 13,136,259.30/x
  3. Step 3: Cross multiply
    20,789,009.70x = 31,136,275.35 × 13,136,259.30
  4. Step 4: Simplify right side
    20,789,009.70x = 409,014,186,633,798.31
  5. Step 5: Solve for x
    x = 409,014,186,633,798.31/20,789,009.70
  6. Step 6: Final answer
    x = 19,674,539.22

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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.