Home / 42,509.60-63,766.80-12,928.40

Finding the Fourth Proportional to 42,509.60, 63,766.80 and 12,928.40

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Solution

The fourth proportional to 42,509.60, 63,766.80 and 12,928.40 is: 19,393.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,509.60 : 63,766.80 = 12,928.40 : x
  2. Step 2: Convert to fraction form
    42,509.60/63,766.80 = 12,928.40/x
  3. Step 3: Cross multiply
    42,509.60x = 63,766.80 × 12,928.40
  4. Step 4: Simplify right side
    42,509.60x = 824,402,697.12
  5. Step 5: Solve for x
    x = 824,402,697.12/42,509.60
  6. Step 6: Final answer
    x = 19,393.33

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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.