Home / 42,985.54-64,477.70-13,403.67

Finding the Fourth Proportional to 42,985.54, 64,477.70 and 13,403.67

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Solution

The fourth proportional to 42,985.54, 64,477.70 and 13,403.67 is: 20,105.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,985.54 : 64,477.70 = 13,403.67 : x
  2. Step 2: Convert to fraction form
    42,985.54/64,477.70 = 13,403.67/x
  3. Step 3: Cross multiply
    42,985.54x = 64,477.70 × 13,403.67
  4. Step 4: Simplify right side
    42,985.54x = 864,237,813.16
  5. Step 5: Solve for x
    x = 864,237,813.16/42,985.54
  6. Step 6: Final answer
    x = 20,105.31

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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.