Home / 30,678,389.76-42,337,064-16,928,239.36

Finding the Fourth Proportional to 30,678,389.76, 42,337,064 and 16,928,239.36

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Solution

The fourth proportional to 30,678,389.76, 42,337,064 and 16,928,239.36 is: 23,361,459.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678,389.76 : 42,337,064 = 16,928,239.36 : x
  2. Step 2: Convert to fraction form
    30,678,389.76/42,337,064 = 16,928,239.36/x
  3. Step 3: Cross multiply
    30,678,389.76x = 42,337,064 × 16,928,239.36
  4. Step 4: Simplify right side
    30,678,389.76x = 716,691,953,191,639
  5. Step 5: Solve for x
    x = 716,691,953,191,639/30,678,389.76
  6. Step 6: Final answer
    x = 23,361,459.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.