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Finding the Fourth Proportional to 19,426,978.16, 29,135,389.76 and 5,776,448.40

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Solution

The fourth proportional to 19,426,978.16, 29,135,389.76 and 5,776,448.40 is: 8,663,162.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,426,978.16 : 29,135,389.76 = 5,776,448.40 : x
  2. Step 2: Convert to fraction form
    19,426,978.16/29,135,389.76 = 5,776,448.40/x
  3. Step 3: Cross multiply
    19,426,978.16x = 29,135,389.76 × 5,776,448.40
  4. Step 4: Simplify right side
    19,426,978.16x = 168,299,075,562,528.41
  5. Step 5: Solve for x
    x = 168,299,075,562,528.41/19,426,978.16
  6. Step 6: Final answer
    x = 8,663,162.85

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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.