Finding the Fourth Proportional to 21,044,931.81, 29,033,976.45 and 12,781,877.19
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Solution
The fourth proportional to 21,044,931.81, 29,033,976.45 and 12,781,877.19 is: 17,634,113.75
Step by Step Solution
- Step 1: Write the proportion equation
21,044,931.81 : 29,033,976.45 = 12,781,877.19 : x - Step 2: Convert to fraction form
21,044,931.81/29,033,976.45 = 12,781,877.19/x - Step 3: Cross multiply
21,044,931.81x = 29,033,976.45 × 12,781,877.19 - Step 4: Simplify right side
21,044,931.81x = 371,108,721,321,252.12 - Step 5: Solve for x
x = 371,108,721,321,252.12/21,044,931.81 - Step 6: Final answer
x = 17,634,113.75
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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.