Home / 42,574.40-63,870.88-12,991.44

Finding the Fourth Proportional to 42,574.40, 63,870.88 and 12,991.44

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Solution

The fourth proportional to 42,574.40, 63,870.88 and 12,991.44 is: 19,489.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,574.40 : 63,870.88 = 12,991.44 : x
  2. Step 2: Convert to fraction form
    42,574.40/63,870.88 = 12,991.44/x
  3. Step 3: Cross multiply
    42,574.40x = 63,870.88 × 12,991.44
  4. Step 4: Simplify right side
    42,574.40x = 829,774,705.27
  5. Step 5: Solve for x
    x = 829,774,705.27/42,574.40
  6. Step 6: Final answer
    x = 19,489.99

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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.