Home / 19,870.61-27,420.08-10,918.49

Finding the Fourth Proportional to 19,870.61, 27,420.08 and 10,918.49

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Solution

The fourth proportional to 19,870.61, 27,420.08 and 10,918.49 is: 15,066.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.61 : 27,420.08 = 10,918.49 : x
  2. Step 2: Convert to fraction form
    19,870.61/27,420.08 = 10,918.49/x
  3. Step 3: Cross multiply
    19,870.61x = 27,420.08 × 10,918.49
  4. Step 4: Simplify right side
    19,870.61x = 299,385,677.59
  5. Step 5: Solve for x
    x = 299,385,677.59/19,870.61
  6. Step 6: Final answer
    x = 15,066.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.