Home / 21,178,047.80-31,767,071.70-19,902,589.40

Finding the Fourth Proportional to 21,178,047.80, 31,767,071.70 and 19,902,589.40

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Solution

The fourth proportional to 21,178,047.80, 31,767,071.70 and 19,902,589.40 is: 29,853,884.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178,047.80 : 31,767,071.70 = 19,902,589.40 : x
  2. Step 2: Convert to fraction form
    21,178,047.80/31,767,071.70 = 19,902,589.40/x
  3. Step 3: Cross multiply
    21,178,047.80x = 31,767,071.70 × 19,902,589.40
  4. Step 4: Simplify right side
    21,178,047.80x = 632,246,984,485,459.88
  5. Step 5: Solve for x
    x = 632,246,984,485,459.88/21,178,047.80
  6. Step 6: Final answer
    x = 29,853,884.10

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1.5x scale

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.