Home / 42,438.51-63,666.87-12,858.64

Finding the Fourth Proportional to 42,438.51, 63,666.87 and 12,858.64

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Solution

The fourth proportional to 42,438.51, 63,666.87 and 12,858.64 is: 19,290.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,438.51 : 63,666.87 = 12,858.64 : x
  2. Step 2: Convert to fraction form
    42,438.51/63,666.87 = 12,858.64/x
  3. Step 3: Cross multiply
    42,438.51x = 63,666.87 × 12,858.64
  4. Step 4: Simplify right side
    42,438.51x = 818,669,361.26
  5. Step 5: Solve for x
    x = 818,669,361.26/42,438.51
  6. Step 6: Final answer
    x = 19,290.72

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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.