Home / 42,698.20-64,056.90-13,117.40

Finding the Fourth Proportional to 42,698.20, 64,056.90 and 13,117.40

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Solution

The fourth proportional to 42,698.20, 64,056.90 and 13,117.40 is: 19,679.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,698.20 : 64,056.90 = 13,117.40 : x
  2. Step 2: Convert to fraction form
    42,698.20/64,056.90 = 13,117.40/x
  3. Step 3: Cross multiply
    42,698.20x = 64,056.90 × 13,117.40
  4. Step 4: Simplify right side
    42,698.20x = 840,259,980.06
  5. Step 5: Solve for x
    x = 840,259,980.06/42,698.20
  6. Step 6: Final answer
    x = 19,679.05

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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.