Home / 13,681.51-18,875.30-8,643.78

Finding the Fourth Proportional to 13,681.51, 18,875.30 and 8,643.78

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Solution

The fourth proportional to 13,681.51, 18,875.30 and 8,643.78 is: 11,925.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.51 : 18,875.30 = 8,643.78 : x
  2. Step 2: Convert to fraction form
    13,681.51/18,875.30 = 8,643.78/x
  3. Step 3: Cross multiply
    13,681.51x = 18,875.30 × 8,643.78
  4. Step 4: Simplify right side
    13,681.51x = 163,153,897.42
  5. Step 5: Solve for x
    x = 163,153,897.42/13,681.51
  6. Step 6: Final answer
    x = 11,925.14

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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.