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Finding the Fourth Proportional to 19,281,458.40, 28,866,200.40 and 18,721,586.40

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Solution

The fourth proportional to 19,281,458.40, 28,866,200.40 and 18,721,586.40 is: 28,028,018.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,281,458.40 : 28,866,200.40 = 18,721,586.40 : x
  2. Step 2: Convert to fraction form
    19,281,458.40/28,866,200.40 = 18,721,586.40/x
  3. Step 3: Cross multiply
    19,281,458.40x = 28,866,200.40 × 18,721,586.40
  4. Step 4: Simplify right side
    19,281,458.40x = 540,421,064,828,314.50
  5. Step 5: Solve for x
    x = 540,421,064,828,314.50/19,281,458.40
  6. Step 6: Final answer
    x = 28,028,018.09

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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.