Home / 21,186,739.80-31,780,109.70-19,911,281.40

Finding the Fourth Proportional to 21,186,739.80, 31,780,109.70 and 19,911,281.40

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Solution

The fourth proportional to 21,186,739.80, 31,780,109.70 and 19,911,281.40 is: 29,866,922.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186,739.80 : 31,780,109.70 = 19,911,281.40 : x
  2. Step 2: Convert to fraction form
    21,186,739.80/31,780,109.70 = 19,911,281.40/x
  3. Step 3: Cross multiply
    21,186,739.80x = 31,780,109.70 × 19,911,281.40
  4. Step 4: Simplify right side
    21,186,739.80x = 632,782,707,159,569.50
  5. Step 5: Solve for x
    x = 632,782,707,159,569.50/21,186,739.80
  6. Step 6: Final answer
    x = 29,866,922.10

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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.