Home / 42,684.80-64,027.20-13,102.40

Finding the Fourth Proportional to 42,684.80, 64,027.20 and 13,102.40

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Solution

The fourth proportional to 42,684.80, 64,027.20 and 13,102.40 is: 19,653.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,684.80 : 64,027.20 = 13,102.40 : x
  2. Step 2: Convert to fraction form
    42,684.80/64,027.20 = 13,102.40/x
  3. Step 3: Cross multiply
    42,684.80x = 64,027.20 × 13,102.40
  4. Step 4: Simplify right side
    42,684.80x = 838,909,985.28
  5. Step 5: Solve for x
    x = 838,909,985.28/42,684.80
  6. Step 6: Final answer
    x = 19,653.60

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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.