Home / 19,870.32-27,421.72-10,918.64

Finding the Fourth Proportional to 19,870.32, 27,421.72 and 10,918.64

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Solution

The fourth proportional to 19,870.32, 27,421.72 and 10,918.64 is: 15,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,870.32 : 27,421.72 = 10,918.64 : x
  2. Step 2: Convert to fraction form
    19,870.32/27,421.72 = 10,918.64/x
  3. Step 3: Cross multiply
    19,870.32x = 27,421.72 × 10,918.64
  4. Step 4: Simplify right side
    19,870.32x = 299,407,888.86
  5. Step 5: Solve for x
    x = 299,407,888.86/19,870.32
  6. Step 6: Final answer
    x = 15,068.10

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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.