Home / 42,938.80-64,405.50-13,354.36

Finding the Fourth Proportional to 42,938.80, 64,405.50 and 13,354.36

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Solution

The fourth proportional to 42,938.80, 64,405.50 and 13,354.36 is: 20,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,938.80 : 64,405.50 = 13,354.36 : x
  2. Step 2: Convert to fraction form
    42,938.80/64,405.50 = 13,354.36/x
  3. Step 3: Cross multiply
    42,938.80x = 64,405.50 × 13,354.36
  4. Step 4: Simplify right side
    42,938.80x = 860,094,232.98
  5. Step 5: Solve for x
    x = 860,094,232.98/42,938.80
  6. Step 6: Final answer
    x = 20,030.70

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1.5x scale

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.